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![Igor Matheus Andrade Torrente](/assets/img/avatar_default.png)
This issue happens when a userspace program does an ioctl FBIOPUT_VSCREENINFO passing the fb_var_screeninfo struct containing only the fields xres, yres, and bits_per_pixel with values. If this struct is the same as the previous ioctl, the vc_resize() detects it and doesn't call the resize_screen(), leaving the fb_var_screeninfo incomplete. And this leads to the updatescrollmode() calculates a wrong value to fbcon_display->vrows, which makes the real_y() return a wrong value of y, and that value, eventually, causes the imageblit to access an out-of-bound address value. To solve this issue I made the resize_screen() be called even if the screen does not need any resizing, so it will "fix and fill" the fb_var_screeninfo independently. Cc: stable <stable@vger.kernel.org> # after 5.15-rc2 is out, give it time to bake Reported-and-tested-by: syzbot+858dc7a2f7ef07c2c219@syzkaller.appspotmail.com Signed-off-by: Igor Matheus Andrade Torrente <igormtorrente@gmail.com> Link: https://lore.kernel.org/r/20210628134509.15895-1-igormtorrente@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4825 lines
113 KiB
C
4825 lines
113 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 1991, 1992 Linus Torvalds
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*/
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/*
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* Hopefully this will be a rather complete VT102 implementation.
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*
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* Beeping thanks to John T Kohl.
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*
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* Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
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* Chars, and VT100 enhancements by Peter MacDonald.
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*
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* Copy and paste function by Andrew Haylett,
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* some enhancements by Alessandro Rubini.
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*
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* Code to check for different video-cards mostly by Galen Hunt,
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* <g-hunt@ee.utah.edu>
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*
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* Rudimentary ISO 10646/Unicode/UTF-8 character set support by
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* Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
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*
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* Dynamic allocation of consoles, aeb@cwi.nl, May 1994
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* Resizing of consoles, aeb, 940926
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*
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* Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
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* <poe@daimi.aau.dk>
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*
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* User-defined bell sound, new setterm control sequences and printk
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* redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
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*
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* APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
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*
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* Merge with the abstract console driver by Geert Uytterhoeven
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* <geert@linux-m68k.org>, Jan 1997.
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*
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* Original m68k console driver modifications by
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*
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* - Arno Griffioen <arno@usn.nl>
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* - David Carter <carter@cs.bris.ac.uk>
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*
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* The abstract console driver provides a generic interface for a text
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* console. It supports VGA text mode, frame buffer based graphical consoles
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* and special graphics processors that are only accessible through some
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* registers (e.g. a TMS340x0 GSP).
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*
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* The interface to the hardware is specified using a special structure
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* (struct consw) which contains function pointers to console operations
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* (see <linux/console.h> for more information).
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*
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* Support for changeable cursor shape
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* by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
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*
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* Ported to i386 and con_scrolldelta fixed
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* by Emmanuel Marty <core@ggi-project.org>, April 1998
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*
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* Resurrected character buffers in videoram plus lots of other trickery
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* by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
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*
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* Removed old-style timers, introduced console_timer, made timer
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* deletion SMP-safe. 17Jun00, Andrew Morton
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*
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* Removed console_lock, enabled interrupts across all console operations
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* 13 March 2001, Andrew Morton
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*
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* Fixed UTF-8 mode so alternate charset modes always work according
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* to control sequences interpreted in do_con_trol function
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* preserving backward VT100 semigraphics compatibility,
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* malformed UTF sequences represented as sequences of replacement glyphs,
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* original codes or '?' as a last resort if replacement glyph is undefined
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* by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/sched/signal.h>
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#include <linux/tty.h>
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#include <linux/tty_flip.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/kd.h>
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#include <linux/slab.h>
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#include <linux/vmalloc.h>
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#include <linux/major.h>
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#include <linux/mm.h>
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#include <linux/console.h>
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#include <linux/init.h>
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#include <linux/mutex.h>
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#include <linux/vt_kern.h>
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#include <linux/selection.h>
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#include <linux/tiocl.h>
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#include <linux/kbd_kern.h>
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#include <linux/consolemap.h>
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#include <linux/timer.h>
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#include <linux/interrupt.h>
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#include <linux/workqueue.h>
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#include <linux/pm.h>
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#include <linux/font.h>
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#include <linux/bitops.h>
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#include <linux/notifier.h>
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#include <linux/device.h>
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#include <linux/io.h>
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#include <linux/uaccess.h>
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#include <linux/kdb.h>
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#include <linux/ctype.h>
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#include <linux/bsearch.h>
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#include <linux/gcd.h>
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#define MAX_NR_CON_DRIVER 16
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#define CON_DRIVER_FLAG_MODULE 1
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#define CON_DRIVER_FLAG_INIT 2
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#define CON_DRIVER_FLAG_ATTR 4
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#define CON_DRIVER_FLAG_ZOMBIE 8
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struct con_driver {
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const struct consw *con;
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const char *desc;
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struct device *dev;
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int node;
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int first;
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int last;
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int flag;
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};
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static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER];
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const struct consw *conswitchp;
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/*
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* Here is the default bell parameters: 750HZ, 1/8th of a second
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*/
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#define DEFAULT_BELL_PITCH 750
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#define DEFAULT_BELL_DURATION (HZ/8)
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#define DEFAULT_CURSOR_BLINK_MS 200
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struct vc vc_cons [MAX_NR_CONSOLES];
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#ifndef VT_SINGLE_DRIVER
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static const struct consw *con_driver_map[MAX_NR_CONSOLES];
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#endif
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static int con_open(struct tty_struct *, struct file *);
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static void vc_init(struct vc_data *vc, unsigned int rows,
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unsigned int cols, int do_clear);
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static void gotoxy(struct vc_data *vc, int new_x, int new_y);
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static void save_cur(struct vc_data *vc);
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static void reset_terminal(struct vc_data *vc, int do_clear);
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static void con_flush_chars(struct tty_struct *tty);
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static int set_vesa_blanking(char __user *p);
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static void set_cursor(struct vc_data *vc);
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static void hide_cursor(struct vc_data *vc);
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static void console_callback(struct work_struct *ignored);
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static void con_driver_unregister_callback(struct work_struct *ignored);
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static void blank_screen_t(struct timer_list *unused);
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static void set_palette(struct vc_data *vc);
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#define vt_get_kmsg_redirect() vt_kmsg_redirect(-1)
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static int printable; /* Is console ready for printing? */
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int default_utf8 = true;
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module_param(default_utf8, int, S_IRUGO | S_IWUSR);
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int global_cursor_default = -1;
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module_param(global_cursor_default, int, S_IRUGO | S_IWUSR);
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static int cur_default = CUR_UNDERLINE;
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module_param(cur_default, int, S_IRUGO | S_IWUSR);
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/*
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* ignore_poke: don't unblank the screen when things are typed. This is
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* mainly for the privacy of braille terminal users.
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*/
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static int ignore_poke;
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int do_poke_blanked_console;
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int console_blanked;
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static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
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static int vesa_off_interval;
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static int blankinterval;
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core_param(consoleblank, blankinterval, int, 0444);
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static DECLARE_WORK(console_work, console_callback);
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static DECLARE_WORK(con_driver_unregister_work, con_driver_unregister_callback);
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/*
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* fg_console is the current virtual console,
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* last_console is the last used one,
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* want_console is the console we want to switch to,
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* saved_* variants are for save/restore around kernel debugger enter/leave
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*/
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int fg_console;
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int last_console;
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int want_console = -1;
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static int saved_fg_console;
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static int saved_last_console;
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static int saved_want_console;
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static int saved_vc_mode;
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static int saved_console_blanked;
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/*
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* For each existing display, we have a pointer to console currently visible
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* on that display, allowing consoles other than fg_console to be refreshed
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* appropriately. Unless the low-level driver supplies its own display_fg
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* variable, we use this one for the "master display".
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*/
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static struct vc_data *master_display_fg;
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/*
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* Unfortunately, we need to delay tty echo when we're currently writing to the
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* console since the code is (and always was) not re-entrant, so we schedule
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* all flip requests to process context with schedule-task() and run it from
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* console_callback().
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*/
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/*
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* For the same reason, we defer scrollback to the console callback.
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*/
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static int scrollback_delta;
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/*
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* Hook so that the power management routines can (un)blank
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* the console on our behalf.
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*/
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int (*console_blank_hook)(int);
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static DEFINE_TIMER(console_timer, blank_screen_t);
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static int blank_state;
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static int blank_timer_expired;
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enum {
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blank_off = 0,
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blank_normal_wait,
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blank_vesa_wait,
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};
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/*
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* /sys/class/tty/tty0/
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*
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* the attribute 'active' contains the name of the current vc
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* console and it supports poll() to detect vc switches
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*/
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static struct device *tty0dev;
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/*
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* Notifier list for console events.
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*/
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static ATOMIC_NOTIFIER_HEAD(vt_notifier_list);
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int register_vt_notifier(struct notifier_block *nb)
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{
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return atomic_notifier_chain_register(&vt_notifier_list, nb);
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}
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EXPORT_SYMBOL_GPL(register_vt_notifier);
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int unregister_vt_notifier(struct notifier_block *nb)
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{
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return atomic_notifier_chain_unregister(&vt_notifier_list, nb);
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}
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EXPORT_SYMBOL_GPL(unregister_vt_notifier);
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static void notify_write(struct vc_data *vc, unsigned int unicode)
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{
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struct vt_notifier_param param = { .vc = vc, .c = unicode };
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atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, ¶m);
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}
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static void notify_update(struct vc_data *vc)
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{
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struct vt_notifier_param param = { .vc = vc };
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atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, ¶m);
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}
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/*
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* Low-Level Functions
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*/
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static inline bool con_is_fg(const struct vc_data *vc)
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{
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return vc->vc_num == fg_console;
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}
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static inline bool con_should_update(const struct vc_data *vc)
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{
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return con_is_visible(vc) && !console_blanked;
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}
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static inline unsigned short *screenpos(const struct vc_data *vc, int offset,
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bool viewed)
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{
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unsigned short *p;
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if (!viewed)
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p = (unsigned short *)(vc->vc_origin + offset);
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else if (!vc->vc_sw->con_screen_pos)
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p = (unsigned short *)(vc->vc_visible_origin + offset);
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else
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p = vc->vc_sw->con_screen_pos(vc, offset);
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return p;
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}
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/* Called from the keyboard irq path.. */
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static inline void scrolldelta(int lines)
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{
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/* FIXME */
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/* scrolldelta needs some kind of consistency lock, but the BKL was
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and still is not protecting versus the scheduled back end */
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scrollback_delta += lines;
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schedule_console_callback();
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}
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void schedule_console_callback(void)
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{
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schedule_work(&console_work);
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}
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/*
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* Code to manage unicode-based screen buffers
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*/
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#ifdef NO_VC_UNI_SCREEN
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/* this disables and optimizes related code away at compile time */
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#define get_vc_uniscr(vc) NULL
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#else
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#define get_vc_uniscr(vc) vc->vc_uni_screen
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#endif
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#define VC_UNI_SCREEN_DEBUG 0
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typedef uint32_t char32_t;
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/*
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* Our screen buffer is preceded by an array of line pointers so that
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* scrolling only implies some pointer shuffling.
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*/
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struct uni_screen {
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char32_t *lines[0];
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};
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static struct uni_screen *vc_uniscr_alloc(unsigned int cols, unsigned int rows)
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{
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struct uni_screen *uniscr;
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void *p;
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unsigned int memsize, i;
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/* allocate everything in one go */
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memsize = cols * rows * sizeof(char32_t);
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memsize += rows * sizeof(char32_t *);
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p = vmalloc(memsize);
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if (!p)
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return NULL;
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/* initial line pointers */
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uniscr = p;
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p = uniscr->lines + rows;
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for (i = 0; i < rows; i++) {
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uniscr->lines[i] = p;
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p += cols * sizeof(char32_t);
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}
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return uniscr;
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}
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static void vc_uniscr_free(struct uni_screen *uniscr)
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{
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vfree(uniscr);
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}
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static void vc_uniscr_set(struct vc_data *vc, struct uni_screen *new_uniscr)
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{
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vc_uniscr_free(vc->vc_uni_screen);
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vc->vc_uni_screen = new_uniscr;
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}
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static void vc_uniscr_putc(struct vc_data *vc, char32_t uc)
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{
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struct uni_screen *uniscr = get_vc_uniscr(vc);
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if (uniscr)
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uniscr->lines[vc->state.y][vc->state.x] = uc;
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}
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static void vc_uniscr_insert(struct vc_data *vc, unsigned int nr)
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{
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struct uni_screen *uniscr = get_vc_uniscr(vc);
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if (uniscr) {
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char32_t *ln = uniscr->lines[vc->state.y];
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unsigned int x = vc->state.x, cols = vc->vc_cols;
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memmove(&ln[x + nr], &ln[x], (cols - x - nr) * sizeof(*ln));
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memset32(&ln[x], ' ', nr);
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}
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}
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static void vc_uniscr_delete(struct vc_data *vc, unsigned int nr)
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{
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struct uni_screen *uniscr = get_vc_uniscr(vc);
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if (uniscr) {
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char32_t *ln = uniscr->lines[vc->state.y];
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unsigned int x = vc->state.x, cols = vc->vc_cols;
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memcpy(&ln[x], &ln[x + nr], (cols - x - nr) * sizeof(*ln));
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memset32(&ln[cols - nr], ' ', nr);
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}
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}
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static void vc_uniscr_clear_line(struct vc_data *vc, unsigned int x,
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unsigned int nr)
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{
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struct uni_screen *uniscr = get_vc_uniscr(vc);
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if (uniscr) {
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char32_t *ln = uniscr->lines[vc->state.y];
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memset32(&ln[x], ' ', nr);
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}
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}
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static void vc_uniscr_clear_lines(struct vc_data *vc, unsigned int y,
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unsigned int nr)
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{
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struct uni_screen *uniscr = get_vc_uniscr(vc);
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if (uniscr) {
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unsigned int cols = vc->vc_cols;
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while (nr--)
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memset32(uniscr->lines[y++], ' ', cols);
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}
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}
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static void vc_uniscr_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
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enum con_scroll dir, unsigned int nr)
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{
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struct uni_screen *uniscr = get_vc_uniscr(vc);
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if (uniscr) {
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unsigned int i, j, k, sz, d, clear;
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sz = b - t;
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clear = b - nr;
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d = nr;
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if (dir == SM_DOWN) {
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clear = t;
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d = sz - nr;
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}
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for (i = 0; i < gcd(d, sz); i++) {
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char32_t *tmp = uniscr->lines[t + i];
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j = i;
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while (1) {
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k = j + d;
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if (k >= sz)
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k -= sz;
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if (k == i)
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break;
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uniscr->lines[t + j] = uniscr->lines[t + k];
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j = k;
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}
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uniscr->lines[t + j] = tmp;
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}
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vc_uniscr_clear_lines(vc, clear, nr);
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}
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}
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static void vc_uniscr_copy_area(struct uni_screen *dst,
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unsigned int dst_cols,
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unsigned int dst_rows,
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struct uni_screen *src,
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unsigned int src_cols,
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unsigned int src_top_row,
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unsigned int src_bot_row)
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{
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unsigned int dst_row = 0;
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if (!dst)
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return;
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while (src_top_row < src_bot_row) {
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char32_t *src_line = src->lines[src_top_row];
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char32_t *dst_line = dst->lines[dst_row];
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memcpy(dst_line, src_line, src_cols * sizeof(char32_t));
|
|
if (dst_cols - src_cols)
|
|
memset32(dst_line + src_cols, ' ', dst_cols - src_cols);
|
|
src_top_row++;
|
|
dst_row++;
|
|
}
|
|
while (dst_row < dst_rows) {
|
|
char32_t *dst_line = dst->lines[dst_row];
|
|
|
|
memset32(dst_line, ' ', dst_cols);
|
|
dst_row++;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Called from vcs_read() to make sure unicode screen retrieval is possible.
|
|
* This will initialize the unicode screen buffer if not already done.
|
|
* This returns 0 if OK, or a negative error code otherwise.
|
|
* In particular, -ENODATA is returned if the console is not in UTF-8 mode.
|
|
*/
|
|
int vc_uniscr_check(struct vc_data *vc)
|
|
{
|
|
struct uni_screen *uniscr;
|
|
unsigned short *p;
|
|
int x, y, mask;
|
|
|
|
if (__is_defined(NO_VC_UNI_SCREEN))
|
|
return -EOPNOTSUPP;
|
|
|
|
WARN_CONSOLE_UNLOCKED();
|
|
|
|
if (!vc->vc_utf)
|
|
return -ENODATA;
|
|
|
|
if (vc->vc_uni_screen)
|
|
return 0;
|
|
|
|
uniscr = vc_uniscr_alloc(vc->vc_cols, vc->vc_rows);
|
|
if (!uniscr)
|
|
return -ENOMEM;
|
|
|
|
/*
|
|
* Let's populate it initially with (imperfect) reverse translation.
|
|
* This is the next best thing we can do short of having it enabled
|
|
* from the start even when no users rely on this functionality. True
|
|
* unicode content will be available after a complete screen refresh.
|
|
*/
|
|
p = (unsigned short *)vc->vc_origin;
|
|
mask = vc->vc_hi_font_mask | 0xff;
|
|
for (y = 0; y < vc->vc_rows; y++) {
|
|
char32_t *line = uniscr->lines[y];
|
|
for (x = 0; x < vc->vc_cols; x++) {
|
|
u16 glyph = scr_readw(p++) & mask;
|
|
line[x] = inverse_translate(vc, glyph, true);
|
|
}
|
|
}
|
|
|
|
vc->vc_uni_screen = uniscr;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Called from vcs_read() to get the unicode data from the screen.
|
|
* This must be preceded by a successful call to vc_uniscr_check() once
|
|
* the console lock has been taken.
|
|
*/
|
|
void vc_uniscr_copy_line(const struct vc_data *vc, void *dest, bool viewed,
|
|
unsigned int row, unsigned int col, unsigned int nr)
|
|
{
|
|
struct uni_screen *uniscr = get_vc_uniscr(vc);
|
|
int offset = row * vc->vc_size_row + col * 2;
|
|
unsigned long pos;
|
|
|
|
BUG_ON(!uniscr);
|
|
|
|
pos = (unsigned long)screenpos(vc, offset, viewed);
|
|
if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
|
|
/*
|
|
* Desired position falls in the main screen buffer.
|
|
* However the actual row/col might be different if
|
|
* scrollback is active.
|
|
*/
|
|
row = (pos - vc->vc_origin) / vc->vc_size_row;
|
|
col = ((pos - vc->vc_origin) % vc->vc_size_row) / 2;
|
|
memcpy(dest, &uniscr->lines[row][col], nr * sizeof(char32_t));
|
|
} else {
|
|
/*
|
|
* Scrollback is active. For now let's simply backtranslate
|
|
* the screen glyphs until the unicode screen buffer does
|
|
* synchronize with console display drivers for a scrollback
|
|
* buffer of its own.
|
|
*/
|
|
u16 *p = (u16 *)pos;
|
|
int mask = vc->vc_hi_font_mask | 0xff;
|
|
char32_t *uni_buf = dest;
|
|
while (nr--) {
|
|
u16 glyph = scr_readw(p++) & mask;
|
|
*uni_buf++ = inverse_translate(vc, glyph, true);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* this is for validation and debugging only */
|
|
static void vc_uniscr_debug_check(struct vc_data *vc)
|
|
{
|
|
struct uni_screen *uniscr = get_vc_uniscr(vc);
|
|
unsigned short *p;
|
|
int x, y, mask;
|
|
|
|
if (!VC_UNI_SCREEN_DEBUG || !uniscr)
|
|
return;
|
|
|
|
WARN_CONSOLE_UNLOCKED();
|
|
|
|
/*
|
|
* Make sure our unicode screen translates into the same glyphs
|
|
* as the actual screen. This is brutal indeed.
|
|
*/
|
|
p = (unsigned short *)vc->vc_origin;
|
|
mask = vc->vc_hi_font_mask | 0xff;
|
|
for (y = 0; y < vc->vc_rows; y++) {
|
|
char32_t *line = uniscr->lines[y];
|
|
for (x = 0; x < vc->vc_cols; x++) {
|
|
u16 glyph = scr_readw(p++) & mask;
|
|
char32_t uc = line[x];
|
|
int tc = conv_uni_to_pc(vc, uc);
|
|
if (tc == -4)
|
|
tc = conv_uni_to_pc(vc, 0xfffd);
|
|
if (tc == -4)
|
|
tc = conv_uni_to_pc(vc, '?');
|
|
if (tc != glyph)
|
|
pr_err_ratelimited(
|
|
"%s: mismatch at %d,%d: glyph=%#x tc=%#x\n",
|
|
__func__, x, y, glyph, tc);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static void con_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
|
|
enum con_scroll dir, unsigned int nr)
|
|
{
|
|
u16 *clear, *d, *s;
|
|
|
|
if (t + nr >= b)
|
|
nr = b - t - 1;
|
|
if (b > vc->vc_rows || t >= b || nr < 1)
|
|
return;
|
|
vc_uniscr_scroll(vc, t, b, dir, nr);
|
|
if (con_is_visible(vc) && vc->vc_sw->con_scroll(vc, t, b, dir, nr))
|
|
return;
|
|
|
|
s = clear = (u16 *)(vc->vc_origin + vc->vc_size_row * t);
|
|
d = (u16 *)(vc->vc_origin + vc->vc_size_row * (t + nr));
|
|
|
|
if (dir == SM_UP) {
|
|
clear = s + (b - t - nr) * vc->vc_cols;
|
|
swap(s, d);
|
|
}
|
|
scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
|
|
scr_memsetw(clear, vc->vc_video_erase_char, vc->vc_size_row * nr);
|
|
}
|
|
|
|
static void do_update_region(struct vc_data *vc, unsigned long start, int count)
|
|
{
|
|
unsigned int xx, yy, offset;
|
|
u16 *p;
|
|
|
|
p = (u16 *) start;
|
|
if (!vc->vc_sw->con_getxy) {
|
|
offset = (start - vc->vc_origin) / 2;
|
|
xx = offset % vc->vc_cols;
|
|
yy = offset / vc->vc_cols;
|
|
} else {
|
|
int nxx, nyy;
|
|
start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
|
|
xx = nxx; yy = nyy;
|
|
}
|
|
for(;;) {
|
|
u16 attrib = scr_readw(p) & 0xff00;
|
|
int startx = xx;
|
|
u16 *q = p;
|
|
while (xx < vc->vc_cols && count) {
|
|
if (attrib != (scr_readw(p) & 0xff00)) {
|
|
if (p > q)
|
|
vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
|
|
startx = xx;
|
|
q = p;
|
|
attrib = scr_readw(p) & 0xff00;
|
|
}
|
|
p++;
|
|
xx++;
|
|
count--;
|
|
}
|
|
if (p > q)
|
|
vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
|
|
if (!count)
|
|
break;
|
|
xx = 0;
|
|
yy++;
|
|
if (vc->vc_sw->con_getxy) {
|
|
p = (u16 *)start;
|
|
start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
|
|
}
|
|
}
|
|
}
|
|
|
|
void update_region(struct vc_data *vc, unsigned long start, int count)
|
|
{
|
|
WARN_CONSOLE_UNLOCKED();
|
|
|
|
if (con_should_update(vc)) {
|
|
hide_cursor(vc);
|
|
do_update_region(vc, start, count);
|
|
set_cursor(vc);
|
|
}
|
|
}
|
|
|
|
/* Structure of attributes is hardware-dependent */
|
|
|
|
static u8 build_attr(struct vc_data *vc, u8 _color,
|
|
enum vc_intensity _intensity, bool _blink, bool _underline,
|
|
bool _reverse, bool _italic)
|
|
{
|
|
if (vc->vc_sw->con_build_attr)
|
|
return vc->vc_sw->con_build_attr(vc, _color, _intensity,
|
|
_blink, _underline, _reverse, _italic);
|
|
|
|
/*
|
|
* ++roman: I completely changed the attribute format for monochrome
|
|
* mode (!can_do_color). The formerly used MDA (monochrome display
|
|
* adapter) format didn't allow the combination of certain effects.
|
|
* Now the attribute is just a bit vector:
|
|
* Bit 0..1: intensity (0..2)
|
|
* Bit 2 : underline
|
|
* Bit 3 : reverse
|
|
* Bit 7 : blink
|
|
*/
|
|
{
|
|
u8 a = _color;
|
|
if (!vc->vc_can_do_color)
|
|
return _intensity |
|
|
(_italic << 1) |
|
|
(_underline << 2) |
|
|
(_reverse << 3) |
|
|
(_blink << 7);
|
|
if (_italic)
|
|
a = (a & 0xF0) | vc->vc_itcolor;
|
|
else if (_underline)
|
|
a = (a & 0xf0) | vc->vc_ulcolor;
|
|
else if (_intensity == VCI_HALF_BRIGHT)
|
|
a = (a & 0xf0) | vc->vc_halfcolor;
|
|
if (_reverse)
|
|
a = (a & 0x88) | (((a >> 4) | (a << 4)) & 0x77);
|
|
if (_blink)
|
|
a ^= 0x80;
|
|
if (_intensity == VCI_BOLD)
|
|
a ^= 0x08;
|
|
if (vc->vc_hi_font_mask == 0x100)
|
|
a <<= 1;
|
|
return a;
|
|
}
|
|
}
|
|
|
|
static void update_attr(struct vc_data *vc)
|
|
{
|
|
vc->vc_attr = build_attr(vc, vc->state.color, vc->state.intensity,
|
|
vc->state.blink, vc->state.underline,
|
|
vc->state.reverse ^ vc->vc_decscnm, vc->state.italic);
|
|
vc->vc_video_erase_char = ' ' | (build_attr(vc, vc->state.color,
|
|
VCI_NORMAL, vc->state.blink, false,
|
|
vc->vc_decscnm, false) << 8);
|
|
}
|
|
|
|
/* Note: inverting the screen twice should revert to the original state */
|
|
void invert_screen(struct vc_data *vc, int offset, int count, bool viewed)
|
|
{
|
|
unsigned short *p;
|
|
|
|
WARN_CONSOLE_UNLOCKED();
|
|
|
|
count /= 2;
|
|
p = screenpos(vc, offset, viewed);
|
|
if (vc->vc_sw->con_invert_region) {
|
|
vc->vc_sw->con_invert_region(vc, p, count);
|
|
} else {
|
|
u16 *q = p;
|
|
int cnt = count;
|
|
u16 a;
|
|
|
|
if (!vc->vc_can_do_color) {
|
|
while (cnt--) {
|
|
a = scr_readw(q);
|
|
a ^= 0x0800;
|
|
scr_writew(a, q);
|
|
q++;
|
|
}
|
|
} else if (vc->vc_hi_font_mask == 0x100) {
|
|
while (cnt--) {
|
|
a = scr_readw(q);
|
|
a = (a & 0x11ff) |
|
|
((a & 0xe000) >> 4) |
|
|
((a & 0x0e00) << 4);
|
|
scr_writew(a, q);
|
|
q++;
|
|
}
|
|
} else {
|
|
while (cnt--) {
|
|
a = scr_readw(q);
|
|
a = (a & 0x88ff) |
|
|
((a & 0x7000) >> 4) |
|
|
((a & 0x0700) << 4);
|
|
scr_writew(a, q);
|
|
q++;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (con_should_update(vc))
|
|
do_update_region(vc, (unsigned long) p, count);
|
|
notify_update(vc);
|
|
}
|
|
|
|
/* used by selection: complement pointer position */
|
|
void complement_pos(struct vc_data *vc, int offset)
|
|
{
|
|
static int old_offset = -1;
|
|
static unsigned short old;
|
|
static unsigned short oldx, oldy;
|
|
|
|
WARN_CONSOLE_UNLOCKED();
|
|
|
|
if (old_offset != -1 && old_offset >= 0 &&
|
|
old_offset < vc->vc_screenbuf_size) {
|
|
scr_writew(old, screenpos(vc, old_offset, true));
|
|
if (con_should_update(vc))
|
|
vc->vc_sw->con_putc(vc, old, oldy, oldx);
|
|
notify_update(vc);
|
|
}
|
|
|
|
old_offset = offset;
|
|
|
|
if (offset != -1 && offset >= 0 &&
|
|
offset < vc->vc_screenbuf_size) {
|
|
unsigned short new;
|
|
unsigned short *p;
|
|
p = screenpos(vc, offset, true);
|
|
old = scr_readw(p);
|
|
new = old ^ vc->vc_complement_mask;
|
|
scr_writew(new, p);
|
|
if (con_should_update(vc)) {
|
|
oldx = (offset >> 1) % vc->vc_cols;
|
|
oldy = (offset >> 1) / vc->vc_cols;
|
|
vc->vc_sw->con_putc(vc, new, oldy, oldx);
|
|
}
|
|
notify_update(vc);
|
|
}
|
|
}
|
|
|
|
static void insert_char(struct vc_data *vc, unsigned int nr)
|
|
{
|
|
unsigned short *p = (unsigned short *) vc->vc_pos;
|
|
|
|
vc_uniscr_insert(vc, nr);
|
|
scr_memmovew(p + nr, p, (vc->vc_cols - vc->state.x - nr) * 2);
|
|
scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
|
|
vc->vc_need_wrap = 0;
|
|
if (con_should_update(vc))
|
|
do_update_region(vc, (unsigned long) p,
|
|
vc->vc_cols - vc->state.x);
|
|
}
|
|
|
|
static void delete_char(struct vc_data *vc, unsigned int nr)
|
|
{
|
|
unsigned short *p = (unsigned short *) vc->vc_pos;
|
|
|
|
vc_uniscr_delete(vc, nr);
|
|
scr_memcpyw(p, p + nr, (vc->vc_cols - vc->state.x - nr) * 2);
|
|
scr_memsetw(p + vc->vc_cols - vc->state.x - nr, vc->vc_video_erase_char,
|
|
nr * 2);
|
|
vc->vc_need_wrap = 0;
|
|
if (con_should_update(vc))
|
|
do_update_region(vc, (unsigned long) p,
|
|
vc->vc_cols - vc->state.x);
|
|
}
|
|
|
|
static int softcursor_original = -1;
|
|
|
|
static void add_softcursor(struct vc_data *vc)
|
|
{
|
|
int i = scr_readw((u16 *) vc->vc_pos);
|
|
u32 type = vc->vc_cursor_type;
|
|
|
|
if (!(type & CUR_SW))
|
|
return;
|
|
if (softcursor_original != -1)
|
|
return;
|
|
softcursor_original = i;
|
|
i |= CUR_SET(type);
|
|
i ^= CUR_CHANGE(type);
|
|
if ((type & CUR_ALWAYS_BG) &&
|
|
(softcursor_original & CUR_BG) == (i & CUR_BG))
|
|
i ^= CUR_BG;
|
|
if ((type & CUR_INVERT_FG_BG) && (i & CUR_FG) == ((i & CUR_BG) >> 4))
|
|
i ^= CUR_FG;
|
|
scr_writew(i, (u16 *)vc->vc_pos);
|
|
if (con_should_update(vc))
|
|
vc->vc_sw->con_putc(vc, i, vc->state.y, vc->state.x);
|
|
}
|
|
|
|
static void hide_softcursor(struct vc_data *vc)
|
|
{
|
|
if (softcursor_original != -1) {
|
|
scr_writew(softcursor_original, (u16 *)vc->vc_pos);
|
|
if (con_should_update(vc))
|
|
vc->vc_sw->con_putc(vc, softcursor_original,
|
|
vc->state.y, vc->state.x);
|
|
softcursor_original = -1;
|
|
}
|
|
}
|
|
|
|
static void hide_cursor(struct vc_data *vc)
|
|
{
|
|
if (vc_is_sel(vc))
|
|
clear_selection();
|
|
|
|
vc->vc_sw->con_cursor(vc, CM_ERASE);
|
|
hide_softcursor(vc);
|
|
}
|
|
|
|
static void set_cursor(struct vc_data *vc)
|
|
{
|
|
if (!con_is_fg(vc) || console_blanked || vc->vc_mode == KD_GRAPHICS)
|
|
return;
|
|
if (vc->vc_deccm) {
|
|
if (vc_is_sel(vc))
|
|
clear_selection();
|
|
add_softcursor(vc);
|
|
if (CUR_SIZE(vc->vc_cursor_type) != CUR_NONE)
|
|
vc->vc_sw->con_cursor(vc, CM_DRAW);
|
|
} else
|
|
hide_cursor(vc);
|
|
}
|
|
|
|
static void set_origin(struct vc_data *vc)
|
|
{
|
|
WARN_CONSOLE_UNLOCKED();
|
|
|
|
if (!con_is_visible(vc) ||
|
|
!vc->vc_sw->con_set_origin ||
|
|
!vc->vc_sw->con_set_origin(vc))
|
|
vc->vc_origin = (unsigned long)vc->vc_screenbuf;
|
|
vc->vc_visible_origin = vc->vc_origin;
|
|
vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
|
|
vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->state.y +
|
|
2 * vc->state.x;
|
|
}
|
|
|
|
static void save_screen(struct vc_data *vc)
|
|
{
|
|
WARN_CONSOLE_UNLOCKED();
|
|
|
|
if (vc->vc_sw->con_save_screen)
|
|
vc->vc_sw->con_save_screen(vc);
|
|
}
|
|
|
|
static void flush_scrollback(struct vc_data *vc)
|
|
{
|
|
WARN_CONSOLE_UNLOCKED();
|
|
|
|
set_origin(vc);
|
|
if (vc->vc_sw->con_flush_scrollback) {
|
|
vc->vc_sw->con_flush_scrollback(vc);
|
|
} else if (con_is_visible(vc)) {
|
|
/*
|
|
* When no con_flush_scrollback method is provided then the
|
|
* legacy way for flushing the scrollback buffer is to use
|
|
* a side effect of the con_switch method. We do it only on
|
|
* the foreground console as background consoles have no
|
|
* scrollback buffers in that case and we obviously don't
|
|
* want to switch to them.
|
|
*/
|
|
hide_cursor(vc);
|
|
vc->vc_sw->con_switch(vc);
|
|
set_cursor(vc);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Redrawing of screen
|
|
*/
|
|
|
|
void clear_buffer_attributes(struct vc_data *vc)
|
|
{
|
|
unsigned short *p = (unsigned short *)vc->vc_origin;
|
|
int count = vc->vc_screenbuf_size / 2;
|
|
int mask = vc->vc_hi_font_mask | 0xff;
|
|
|
|
for (; count > 0; count--, p++) {
|
|
scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
|
|
}
|
|
}
|
|
|
|
void redraw_screen(struct vc_data *vc, int is_switch)
|
|
{
|
|
int redraw = 0;
|
|
|
|
WARN_CONSOLE_UNLOCKED();
|
|
|
|
if (!vc) {
|
|
/* strange ... */
|
|
/* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
|
|
return;
|
|
}
|
|
|
|
if (is_switch) {
|
|
struct vc_data *old_vc = vc_cons[fg_console].d;
|
|
if (old_vc == vc)
|
|
return;
|
|
if (!con_is_visible(vc))
|
|
redraw = 1;
|
|
*vc->vc_display_fg = vc;
|
|
fg_console = vc->vc_num;
|
|
hide_cursor(old_vc);
|
|
if (!con_is_visible(old_vc)) {
|
|
save_screen(old_vc);
|
|
set_origin(old_vc);
|
|
}
|
|
if (tty0dev)
|
|
sysfs_notify(&tty0dev->kobj, NULL, "active");
|
|
} else {
|
|
hide_cursor(vc);
|
|
redraw = 1;
|
|
}
|
|
|
|
if (redraw) {
|
|
int update;
|
|
int old_was_color = vc->vc_can_do_color;
|
|
|
|
set_origin(vc);
|
|
update = vc->vc_sw->con_switch(vc);
|
|
set_palette(vc);
|
|
/*
|
|
* If console changed from mono<->color, the best we can do
|
|
* is to clear the buffer attributes. As it currently stands,
|
|
* rebuilding new attributes from the old buffer is not doable
|
|
* without overly complex code.
|
|
*/
|
|
if (old_was_color != vc->vc_can_do_color) {
|
|
update_attr(vc);
|
|
clear_buffer_attributes(vc);
|
|
}
|
|
|
|
if (update && vc->vc_mode != KD_GRAPHICS)
|
|
do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
|
|
}
|
|
set_cursor(vc);
|
|
if (is_switch) {
|
|
vt_set_leds_compute_shiftstate();
|
|
notify_update(vc);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Allocation, freeing and resizing of VTs.
|
|
*/
|
|
|
|
int vc_cons_allocated(unsigned int i)
|
|
{
|
|
return (i < MAX_NR_CONSOLES && vc_cons[i].d);
|
|
}
|
|
|
|
static void visual_init(struct vc_data *vc, int num, int init)
|
|
{
|
|
/* ++Geert: vc->vc_sw->con_init determines console size */
|
|
if (vc->vc_sw)
|
|
module_put(vc->vc_sw->owner);
|
|
vc->vc_sw = conswitchp;
|
|
#ifndef VT_SINGLE_DRIVER
|
|
if (con_driver_map[num])
|
|
vc->vc_sw = con_driver_map[num];
|
|
#endif
|
|
__module_get(vc->vc_sw->owner);
|
|
vc->vc_num = num;
|
|
vc->vc_display_fg = &master_display_fg;
|
|
if (vc->vc_uni_pagedir_loc)
|
|
con_free_unimap(vc);
|
|
vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
|
|
vc->vc_uni_pagedir = NULL;
|
|
vc->vc_hi_font_mask = 0;
|
|
vc->vc_complement_mask = 0;
|
|
vc->vc_can_do_color = 0;
|
|
vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS;
|
|
vc->vc_sw->con_init(vc, init);
|
|
if (!vc->vc_complement_mask)
|
|
vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
|
|
vc->vc_s_complement_mask = vc->vc_complement_mask;
|
|
vc->vc_size_row = vc->vc_cols << 1;
|
|
vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
|
|
}
|
|
|
|
|
|
static void visual_deinit(struct vc_data *vc)
|
|
{
|
|
vc->vc_sw->con_deinit(vc);
|
|
module_put(vc->vc_sw->owner);
|
|
}
|
|
|
|
static void vc_port_destruct(struct tty_port *port)
|
|
{
|
|
struct vc_data *vc = container_of(port, struct vc_data, port);
|
|
|
|
kfree(vc);
|
|
}
|
|
|
|
static const struct tty_port_operations vc_port_ops = {
|
|
.destruct = vc_port_destruct,
|
|
};
|
|
|
|
/*
|
|
* Change # of rows and columns (0 means unchanged/the size of fg_console)
|
|
* [this is to be used together with some user program
|
|
* like resize that changes the hardware videomode]
|
|
*/
|
|
#define VC_MAXCOL (32767)
|
|
#define VC_MAXROW (32767)
|
|
|
|
int vc_allocate(unsigned int currcons) /* return 0 on success */
|
|
{
|
|
struct vt_notifier_param param;
|
|
struct vc_data *vc;
|
|
int err;
|
|
|
|
WARN_CONSOLE_UNLOCKED();
|
|
|
|
if (currcons >= MAX_NR_CONSOLES)
|
|
return -ENXIO;
|
|
|
|
if (vc_cons[currcons].d)
|
|
return 0;
|
|
|
|
/* due to the granularity of kmalloc, we waste some memory here */
|
|
/* the alloc is done in two steps, to optimize the common situation
|
|
of a 25x80 console (structsize=216, screenbuf_size=4000) */
|
|
/* although the numbers above are not valid since long ago, the
|
|
point is still up-to-date and the comment still has its value
|
|
even if only as a historical artifact. --mj, July 1998 */
|
|
param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL);
|
|
if (!vc)
|
|
return -ENOMEM;
|
|
|
|
vc_cons[currcons].d = vc;
|
|
tty_port_init(&vc->port);
|
|
vc->port.ops = &vc_port_ops;
|
|
INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
|
|
|
|
visual_init(vc, currcons, 1);
|
|
|
|
if (!*vc->vc_uni_pagedir_loc)
|
|
con_set_default_unimap(vc);
|
|
|
|
err = -EINVAL;
|
|
if (vc->vc_cols > VC_MAXCOL || vc->vc_rows > VC_MAXROW ||
|
|
vc->vc_screenbuf_size > KMALLOC_MAX_SIZE || !vc->vc_screenbuf_size)
|
|
goto err_free;
|
|
err = -ENOMEM;
|
|
vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_KERNEL);
|
|
if (!vc->vc_screenbuf)
|
|
goto err_free;
|
|
|
|
/* If no drivers have overridden us and the user didn't pass a
|
|
boot option, default to displaying the cursor */
|
|
if (global_cursor_default == -1)
|
|
global_cursor_default = 1;
|
|
|
|
vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
|
|
vcs_make_sysfs(currcons);
|
|
atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, ¶m);
|
|
|
|
return 0;
|
|
err_free:
|
|
visual_deinit(vc);
|
|
kfree(vc);
|
|
vc_cons[currcons].d = NULL;
|
|
return err;
|
|
}
|
|
|
|
static inline int resize_screen(struct vc_data *vc, int width, int height,
|
|
int user)
|
|
{
|
|
/* Resizes the resolution of the display adapater */
|
|
int err = 0;
|
|
|
|
if (vc->vc_sw->con_resize)
|
|
err = vc->vc_sw->con_resize(vc, width, height, user);
|
|
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* vc_do_resize - resizing method for the tty
|
|
* @tty: tty being resized
|
|
* @vc: virtual console private data
|
|
* @cols: columns
|
|
* @lines: lines
|
|
*
|
|
* Resize a virtual console, clipping according to the actual constraints.
|
|
* If the caller passes a tty structure then update the termios winsize
|
|
* information and perform any necessary signal handling.
|
|
*
|
|
* Caller must hold the console semaphore. Takes the termios rwsem and
|
|
* ctrl.lock of the tty IFF a tty is passed.
|
|
*/
|
|
|
|
static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
|
|
unsigned int cols, unsigned int lines)
|
|
{
|
|
unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
|
|
unsigned long end;
|
|
unsigned int old_rows, old_row_size, first_copied_row;
|
|
unsigned int new_cols, new_rows, new_row_size, new_screen_size;
|
|
unsigned int user;
|
|
unsigned short *oldscreen, *newscreen;
|
|
struct uni_screen *new_uniscr = NULL;
|
|
|
|
WARN_CONSOLE_UNLOCKED();
|
|
|
|
if (!vc)
|
|
return -ENXIO;
|
|
|
|
user = vc->vc_resize_user;
|
|
vc->vc_resize_user = 0;
|
|
|
|
if (cols > VC_MAXCOL || lines > VC_MAXROW)
|
|
return -EINVAL;
|
|
|
|
new_cols = (cols ? cols : vc->vc_cols);
|
|
new_rows = (lines ? lines : vc->vc_rows);
|
|
new_row_size = new_cols << 1;
|
|
new_screen_size = new_row_size * new_rows;
|
|
|
|
if (new_cols == vc->vc_cols && new_rows == vc->vc_rows) {
|
|
/*
|
|
* This function is being called here to cover the case
|
|
* where the userspace calls the FBIOPUT_VSCREENINFO twice,
|
|
* passing the same fb_var_screeninfo containing the fields
|
|
* yres/xres equal to a number non-multiple of vc_font.height
|
|
* and yres_virtual/xres_virtual equal to number lesser than the
|
|
* vc_font.height and yres/xres.
|
|
* In the second call, the struct fb_var_screeninfo isn't
|
|
* being modified by the underlying driver because of the
|
|
* if above, and this causes the fbcon_display->vrows to become
|
|
* negative and it eventually leads to out-of-bound
|
|
* access by the imageblit function.
|
|
* To give the correct values to the struct and to not have
|
|
* to deal with possible errors from the code below, we call
|
|
* the resize_screen here as well.
|
|
*/
|
|
return resize_screen(vc, new_cols, new_rows, user);
|
|
}
|
|
|
|
if (new_screen_size > KMALLOC_MAX_SIZE || !new_screen_size)
|
|
return -EINVAL;
|
|
newscreen = kzalloc(new_screen_size, GFP_USER);
|
|
if (!newscreen)
|
|
return -ENOMEM;
|
|
|
|
if (get_vc_uniscr(vc)) {
|
|
new_uniscr = vc_uniscr_alloc(new_cols, new_rows);
|
|
if (!new_uniscr) {
|
|
kfree(newscreen);
|
|
return -ENOMEM;
|
|
}
|
|
}
|
|
|
|
if (vc_is_sel(vc))
|
|
clear_selection();
|
|
|
|
old_rows = vc->vc_rows;
|
|
old_row_size = vc->vc_size_row;
|
|
|
|
err = resize_screen(vc, new_cols, new_rows, user);
|
|
if (err) {
|
|
kfree(newscreen);
|
|
vc_uniscr_free(new_uniscr);
|
|
return err;
|
|
}
|
|
|
|
vc->vc_rows = new_rows;
|
|
vc->vc_cols = new_cols;
|
|
vc->vc_size_row = new_row_size;
|
|
vc->vc_screenbuf_size = new_screen_size;
|
|
|
|
rlth = min(old_row_size, new_row_size);
|
|
rrem = new_row_size - rlth;
|
|
old_origin = vc->vc_origin;
|
|
new_origin = (long) newscreen;
|
|
new_scr_end = new_origin + new_screen_size;
|
|
|
|
if (vc->state.y > new_rows) {
|
|
if (old_rows - vc->state.y < new_rows) {
|
|
/*
|
|
* Cursor near the bottom, copy contents from the
|
|
* bottom of buffer
|
|
*/
|
|
first_copied_row = (old_rows - new_rows);
|
|
} else {
|
|
/*
|
|
* Cursor is in no man's land, copy 1/2 screenful
|
|
* from the top and bottom of cursor position
|
|
*/
|
|
first_copied_row = (vc->state.y - new_rows/2);
|
|
}
|
|
old_origin += first_copied_row * old_row_size;
|
|
} else
|
|
first_copied_row = 0;
|
|
end = old_origin + old_row_size * min(old_rows, new_rows);
|
|
|
|
vc_uniscr_copy_area(new_uniscr, new_cols, new_rows,
|
|
get_vc_uniscr(vc), rlth/2, first_copied_row,
|
|
min(old_rows, new_rows));
|
|
vc_uniscr_set(vc, new_uniscr);
|
|
|
|
update_attr(vc);
|
|
|
|
while (old_origin < end) {
|
|
scr_memcpyw((unsigned short *) new_origin,
|
|
(unsigned short *) old_origin, rlth);
|
|
if (rrem)
|
|
scr_memsetw((void *)(new_origin + rlth),
|
|
vc->vc_video_erase_char, rrem);
|
|
old_origin += old_row_size;
|
|
new_origin += new_row_size;
|
|
}
|
|
if (new_scr_end > new_origin)
|
|
scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
|
|
new_scr_end - new_origin);
|
|
oldscreen = vc->vc_screenbuf;
|
|
vc->vc_screenbuf = newscreen;
|
|
vc->vc_screenbuf_size = new_screen_size;
|
|
set_origin(vc);
|
|
kfree(oldscreen);
|
|
|
|
/* do part of a reset_terminal() */
|
|
vc->vc_top = 0;
|
|
vc->vc_bottom = vc->vc_rows;
|
|
gotoxy(vc, vc->state.x, vc->state.y);
|
|
save_cur(vc);
|
|
|
|
if (tty) {
|
|
/* Rewrite the requested winsize data with the actual
|
|
resulting sizes */
|
|
struct winsize ws;
|
|
memset(&ws, 0, sizeof(ws));
|
|
ws.ws_row = vc->vc_rows;
|
|
ws.ws_col = vc->vc_cols;
|
|
ws.ws_ypixel = vc->vc_scan_lines;
|
|
tty_do_resize(tty, &ws);
|
|
}
|
|
|
|
if (con_is_visible(vc))
|
|
update_screen(vc);
|
|
vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num);
|
|
notify_update(vc);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* vc_resize - resize a VT
|
|
* @vc: virtual console
|
|
* @cols: columns
|
|
* @rows: rows
|
|
*
|
|
* Resize a virtual console as seen from the console end of things. We
|
|
* use the common vc_do_resize methods to update the structures. The
|
|
* caller must hold the console sem to protect console internals and
|
|
* vc->port.tty
|
|
*/
|
|
|
|
int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows)
|
|
{
|
|
return vc_do_resize(vc->port.tty, vc, cols, rows);
|
|
}
|
|
|
|
/**
|
|
* vt_resize - resize a VT
|
|
* @tty: tty to resize
|
|
* @ws: winsize attributes
|
|
*
|
|
* Resize a virtual terminal. This is called by the tty layer as we
|
|
* register our own handler for resizing. The mutual helper does all
|
|
* the actual work.
|
|
*
|
|
* Takes the console sem and the called methods then take the tty
|
|
* termios_rwsem and the tty ctrl.lock in that order.
|
|
*/
|
|
static int vt_resize(struct tty_struct *tty, struct winsize *ws)
|
|
{
|
|
struct vc_data *vc = tty->driver_data;
|
|
int ret;
|
|
|
|
console_lock();
|
|
ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row);
|
|
console_unlock();
|
|
return ret;
|
|
}
|
|
|
|
struct vc_data *vc_deallocate(unsigned int currcons)
|
|
{
|
|
struct vc_data *vc = NULL;
|
|
|
|
WARN_CONSOLE_UNLOCKED();
|
|
|
|
if (vc_cons_allocated(currcons)) {
|
|
struct vt_notifier_param param;
|
|
|
|
param.vc = vc = vc_cons[currcons].d;
|
|
atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, ¶m);
|
|
vcs_remove_sysfs(currcons);
|
|
visual_deinit(vc);
|
|
con_free_unimap(vc);
|
|
put_pid(vc->vt_pid);
|
|
vc_uniscr_set(vc, NULL);
|
|
kfree(vc->vc_screenbuf);
|
|
vc_cons[currcons].d = NULL;
|
|
}
|
|
return vc;
|
|
}
|
|
|
|
/*
|
|
* VT102 emulator
|
|
*/
|
|
|
|
enum { EPecma = 0, EPdec, EPeq, EPgt, EPlt};
|
|
|
|
#define set_kbd(vc, x) vt_set_kbd_mode_bit((vc)->vc_num, (x))
|
|
#define clr_kbd(vc, x) vt_clr_kbd_mode_bit((vc)->vc_num, (x))
|
|
#define is_kbd(vc, x) vt_get_kbd_mode_bit((vc)->vc_num, (x))
|
|
|
|
#define decarm VC_REPEAT
|
|
#define decckm VC_CKMODE
|
|
#define kbdapplic VC_APPLIC
|
|
#define lnm VC_CRLF
|
|
|
|
const unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
|
|
8,12,10,14, 9,13,11,15 };
|
|
|
|
/* the default colour table, for VGA+ colour systems */
|
|
unsigned char default_red[] = {
|
|
0x00, 0xaa, 0x00, 0xaa, 0x00, 0xaa, 0x00, 0xaa,
|
|
0x55, 0xff, 0x55, 0xff, 0x55, 0xff, 0x55, 0xff
|
|
};
|
|
module_param_array(default_red, byte, NULL, S_IRUGO | S_IWUSR);
|
|
|
|
unsigned char default_grn[] = {
|
|
0x00, 0x00, 0xaa, 0x55, 0x00, 0x00, 0xaa, 0xaa,
|
|
0x55, 0x55, 0xff, 0xff, 0x55, 0x55, 0xff, 0xff
|
|
};
|
|
module_param_array(default_grn, byte, NULL, S_IRUGO | S_IWUSR);
|
|
|
|
unsigned char default_blu[] = {
|
|
0x00, 0x00, 0x00, 0x00, 0xaa, 0xaa, 0xaa, 0xaa,
|
|
0x55, 0x55, 0x55, 0x55, 0xff, 0xff, 0xff, 0xff
|
|
};
|
|
module_param_array(default_blu, byte, NULL, S_IRUGO | S_IWUSR);
|
|
|
|
/*
|
|
* gotoxy() must verify all boundaries, because the arguments
|
|
* might also be negative. If the given position is out of
|
|
* bounds, the cursor is placed at the nearest margin.
|
|
*/
|
|
static void gotoxy(struct vc_data *vc, int new_x, int new_y)
|
|
{
|
|
int min_y, max_y;
|
|
|
|
if (new_x < 0)
|
|
vc->state.x = 0;
|
|
else {
|
|
if (new_x >= vc->vc_cols)
|
|
vc->state.x = vc->vc_cols - 1;
|
|
else
|
|
vc->state.x = new_x;
|
|
}
|
|
|
|
if (vc->vc_decom) {
|
|
min_y = vc->vc_top;
|
|
max_y = vc->vc_bottom;
|
|
} else {
|
|
min_y = 0;
|
|
max_y = vc->vc_rows;
|
|
}
|
|
if (new_y < min_y)
|
|
vc->state.y = min_y;
|
|
else if (new_y >= max_y)
|
|
vc->state.y = max_y - 1;
|
|
else
|
|
vc->state.y = new_y;
|
|
vc->vc_pos = vc->vc_origin + vc->state.y * vc->vc_size_row +
|
|
(vc->state.x << 1);
|
|
vc->vc_need_wrap = 0;
|
|
}
|
|
|
|
/* for absolute user moves, when decom is set */
|
|
static void gotoxay(struct vc_data *vc, int new_x, int new_y)
|
|
{
|
|
gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
|
|
}
|
|
|
|
void scrollback(struct vc_data *vc)
|
|
{
|
|
scrolldelta(-(vc->vc_rows / 2));
|
|
}
|
|
|
|
void scrollfront(struct vc_data *vc, int lines)
|
|
{
|
|
if (!lines)
|
|
lines = vc->vc_rows / 2;
|
|
scrolldelta(lines);
|
|
}
|
|
|
|
static void lf(struct vc_data *vc)
|
|
{
|
|
/* don't scroll if above bottom of scrolling region, or
|
|
* if below scrolling region
|
|
*/
|
|
if (vc->state.y + 1 == vc->vc_bottom)
|
|
con_scroll(vc, vc->vc_top, vc->vc_bottom, SM_UP, 1);
|
|
else if (vc->state.y < vc->vc_rows - 1) {
|
|
vc->state.y++;
|
|
vc->vc_pos += vc->vc_size_row;
|
|
}
|
|
vc->vc_need_wrap = 0;
|
|
notify_write(vc, '\n');
|
|
}
|
|
|
|
static void ri(struct vc_data *vc)
|
|
{
|
|
/* don't scroll if below top of scrolling region, or
|
|
* if above scrolling region
|
|
*/
|
|
if (vc->state.y == vc->vc_top)
|
|
con_scroll(vc, vc->vc_top, vc->vc_bottom, SM_DOWN, 1);
|
|
else if (vc->state.y > 0) {
|
|
vc->state.y--;
|
|
vc->vc_pos -= vc->vc_size_row;
|
|
}
|
|
vc->vc_need_wrap = 0;
|
|
}
|
|
|
|
static inline void cr(struct vc_data *vc)
|
|
{
|
|
vc->vc_pos -= vc->state.x << 1;
|
|
vc->vc_need_wrap = vc->state.x = 0;
|
|
notify_write(vc, '\r');
|
|
}
|
|
|
|
static inline void bs(struct vc_data *vc)
|
|
{
|
|
if (vc->state.x) {
|
|
vc->vc_pos -= 2;
|
|
vc->state.x--;
|
|
vc->vc_need_wrap = 0;
|
|
notify_write(vc, '\b');
|
|
}
|
|
}
|
|
|
|
static inline void del(struct vc_data *vc)
|
|
{
|
|
/* ignored */
|
|
}
|
|
|
|
static void csi_J(struct vc_data *vc, int vpar)
|
|
{
|
|
unsigned int count;
|
|
unsigned short * start;
|
|
|
|
switch (vpar) {
|
|
case 0: /* erase from cursor to end of display */
|
|
vc_uniscr_clear_line(vc, vc->state.x,
|
|
vc->vc_cols - vc->state.x);
|
|
vc_uniscr_clear_lines(vc, vc->state.y + 1,
|
|
vc->vc_rows - vc->state.y - 1);
|
|
count = (vc->vc_scr_end - vc->vc_pos) >> 1;
|
|
start = (unsigned short *)vc->vc_pos;
|
|
break;
|
|
case 1: /* erase from start to cursor */
|
|
vc_uniscr_clear_line(vc, 0, vc->state.x + 1);
|
|
vc_uniscr_clear_lines(vc, 0, vc->state.y);
|
|
count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
|
|
start = (unsigned short *)vc->vc_origin;
|
|
break;
|
|
case 3: /* include scrollback */
|
|
flush_scrollback(vc);
|
|
fallthrough;
|
|
case 2: /* erase whole display */
|
|
vc_uniscr_clear_lines(vc, 0, vc->vc_rows);
|
|
count = vc->vc_cols * vc->vc_rows;
|
|
start = (unsigned short *)vc->vc_origin;
|
|
break;
|
|
default:
|
|
return;
|
|
}
|
|
scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
|
|
if (con_should_update(vc))
|
|
do_update_region(vc, (unsigned long) start, count);
|
|
vc->vc_need_wrap = 0;
|
|
}
|
|
|
|
static void csi_K(struct vc_data *vc, int vpar)
|
|
{
|
|
unsigned int count;
|
|
unsigned short *start = (unsigned short *)vc->vc_pos;
|
|
int offset;
|
|
|
|
switch (vpar) {
|
|
case 0: /* erase from cursor to end of line */
|
|
offset = 0;
|
|
count = vc->vc_cols - vc->state.x;
|
|
break;
|
|
case 1: /* erase from start of line to cursor */
|
|
offset = -vc->state.x;
|
|
count = vc->state.x + 1;
|
|
break;
|
|
case 2: /* erase whole line */
|
|
offset = -vc->state.x;
|
|
count = vc->vc_cols;
|
|
break;
|
|
default:
|
|
return;
|
|
}
|
|
vc_uniscr_clear_line(vc, vc->state.x + offset, count);
|
|
scr_memsetw(start + offset, vc->vc_video_erase_char, 2 * count);
|
|
vc->vc_need_wrap = 0;
|
|
if (con_should_update(vc))
|
|
do_update_region(vc, (unsigned long)(start + offset), count);
|
|
}
|
|
|
|
/* erase the following vpar positions */
|
|
static void csi_X(struct vc_data *vc, unsigned int vpar)
|
|
{ /* not vt100? */
|
|
unsigned int count;
|
|
|
|
if (!vpar)
|
|
vpar++;
|
|
|
|
count = min(vpar, vc->vc_cols - vc->state.x);
|
|
|
|
vc_uniscr_clear_line(vc, vc->state.x, count);
|
|
scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
|
|
if (con_should_update(vc))
|
|
vc->vc_sw->con_clear(vc, vc->state.y, vc->state.x, 1, count);
|
|
vc->vc_need_wrap = 0;
|
|
}
|
|
|
|
static void default_attr(struct vc_data *vc)
|
|
{
|
|
vc->state.intensity = VCI_NORMAL;
|
|
vc->state.italic = false;
|
|
vc->state.underline = false;
|
|
vc->state.reverse = false;
|
|
vc->state.blink = false;
|
|
vc->state.color = vc->vc_def_color;
|
|
}
|
|
|
|
struct rgb { u8 r; u8 g; u8 b; };
|
|
|
|
static void rgb_from_256(int i, struct rgb *c)
|
|
{
|
|
if (i < 8) { /* Standard colours. */
|
|
c->r = i&1 ? 0xaa : 0x00;
|
|
c->g = i&2 ? 0xaa : 0x00;
|
|
c->b = i&4 ? 0xaa : 0x00;
|
|
} else if (i < 16) {
|
|
c->r = i&1 ? 0xff : 0x55;
|
|
c->g = i&2 ? 0xff : 0x55;
|
|
c->b = i&4 ? 0xff : 0x55;
|
|
} else if (i < 232) { /* 6x6x6 colour cube. */
|
|
c->r = (i - 16) / 36 * 85 / 2;
|
|
c->g = (i - 16) / 6 % 6 * 85 / 2;
|
|
c->b = (i - 16) % 6 * 85 / 2;
|
|
} else /* Grayscale ramp. */
|
|
c->r = c->g = c->b = i * 10 - 2312;
|
|
}
|
|
|
|
static void rgb_foreground(struct vc_data *vc, const struct rgb *c)
|
|
{
|
|
u8 hue = 0, max = max3(c->r, c->g, c->b);
|
|
|
|
if (c->r > max / 2)
|
|
hue |= 4;
|
|
if (c->g > max / 2)
|
|
hue |= 2;
|
|
if (c->b > max / 2)
|
|
hue |= 1;
|
|
|
|
if (hue == 7 && max <= 0x55) {
|
|
hue = 0;
|
|
vc->state.intensity = VCI_BOLD;
|
|
} else if (max > 0xaa)
|
|
vc->state.intensity = VCI_BOLD;
|
|
else
|
|
vc->state.intensity = VCI_NORMAL;
|
|
|
|
vc->state.color = (vc->state.color & 0xf0) | hue;
|
|
}
|
|
|
|
static void rgb_background(struct vc_data *vc, const struct rgb *c)
|
|
{
|
|
/* For backgrounds, err on the dark side. */
|
|
vc->state.color = (vc->state.color & 0x0f)
|
|
| (c->r&0x80) >> 1 | (c->g&0x80) >> 2 | (c->b&0x80) >> 3;
|
|
}
|
|
|
|
/*
|
|
* ITU T.416 Higher colour modes. They break the usual properties of SGR codes
|
|
* and thus need to be detected and ignored by hand. That standard also
|
|
* wants : rather than ; as separators but sequences containing : are currently
|
|
* completely ignored by the parser.
|
|
*
|
|
* Subcommands 3 (CMY) and 4 (CMYK) are so insane there's no point in
|
|
* supporting them.
|
|
*/
|
|
static int vc_t416_color(struct vc_data *vc, int i,
|
|
void(*set_color)(struct vc_data *vc, const struct rgb *c))
|
|
{
|
|
struct rgb c;
|
|
|
|
i++;
|
|
if (i > vc->vc_npar)
|
|
return i;
|
|
|
|
if (vc->vc_par[i] == 5 && i + 1 <= vc->vc_npar) {
|
|
/* 256 colours */
|
|
i++;
|
|
rgb_from_256(vc->vc_par[i], &c);
|
|
} else if (vc->vc_par[i] == 2 && i + 3 <= vc->vc_npar) {
|
|
/* 24 bit */
|
|
c.r = vc->vc_par[i + 1];
|
|
c.g = vc->vc_par[i + 2];
|
|
c.b = vc->vc_par[i + 3];
|
|
i += 3;
|
|
} else
|
|
return i;
|
|
|
|
set_color(vc, &c);
|
|
|
|
return i;
|
|
}
|
|
|
|
/* console_lock is held */
|
|
static void csi_m(struct vc_data *vc)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i <= vc->vc_npar; i++)
|
|
switch (vc->vc_par[i]) {
|
|
case 0: /* all attributes off */
|
|
default_attr(vc);
|
|
break;
|
|
case 1:
|
|
vc->state.intensity = VCI_BOLD;
|
|
break;
|
|
case 2:
|
|
vc->state.intensity = VCI_HALF_BRIGHT;
|
|
break;
|
|
case 3:
|
|
vc->state.italic = true;
|
|
break;
|
|
case 21:
|
|
/*
|
|
* No console drivers support double underline, so
|
|
* convert it to a single underline.
|
|
*/
|
|
case 4:
|
|
vc->state.underline = true;
|
|
break;
|
|
case 5:
|
|
vc->state.blink = true;
|
|
break;
|
|
case 7:
|
|
vc->state.reverse = true;
|
|
break;
|
|
case 10: /* ANSI X3.64-1979 (SCO-ish?)
|
|
* Select primary font, don't display control chars if
|
|
* defined, don't set bit 8 on output.
|
|
*/
|
|
vc->vc_translate = set_translate(vc->state.Gx_charset[vc->state.charset], vc);
|
|
vc->vc_disp_ctrl = 0;
|
|
vc->vc_toggle_meta = 0;
|
|
break;
|
|
case 11: /* ANSI X3.64-1979 (SCO-ish?)
|
|
* Select first alternate font, lets chars < 32 be
|
|
* displayed as ROM chars.
|
|
*/
|
|
vc->vc_translate = set_translate(IBMPC_MAP, vc);
|
|
vc->vc_disp_ctrl = 1;
|
|
vc->vc_toggle_meta = 0;
|
|
break;
|
|
case 12: /* ANSI X3.64-1979 (SCO-ish?)
|
|
* Select second alternate font, toggle high bit
|
|
* before displaying as ROM char.
|
|
*/
|
|
vc->vc_translate = set_translate(IBMPC_MAP, vc);
|
|
vc->vc_disp_ctrl = 1;
|
|
vc->vc_toggle_meta = 1;
|
|
break;
|
|
case 22:
|
|
vc->state.intensity = VCI_NORMAL;
|
|
break;
|
|
case 23:
|
|
vc->state.italic = false;
|
|
break;
|
|
case 24:
|
|
vc->state.underline = false;
|
|
break;
|
|
case 25:
|
|
vc->state.blink = false;
|
|
break;
|
|
case 27:
|
|
vc->state.reverse = false;
|
|
break;
|
|
case 38:
|
|
i = vc_t416_color(vc, i, rgb_foreground);
|
|
break;
|
|
case 48:
|
|
i = vc_t416_color(vc, i, rgb_background);
|
|
break;
|
|
case 39:
|
|
vc->state.color = (vc->vc_def_color & 0x0f) |
|
|
(vc->state.color & 0xf0);
|
|
break;
|
|
case 49:
|
|
vc->state.color = (vc->vc_def_color & 0xf0) |
|
|
(vc->state.color & 0x0f);
|
|
break;
|
|
default:
|
|
if (vc->vc_par[i] >= 90 && vc->vc_par[i] <= 107) {
|
|
if (vc->vc_par[i] < 100)
|
|
vc->state.intensity = VCI_BOLD;
|
|
vc->vc_par[i] -= 60;
|
|
}
|
|
if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
|
|
vc->state.color = color_table[vc->vc_par[i] - 30]
|
|
| (vc->state.color & 0xf0);
|
|
else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
|
|
vc->state.color = (color_table[vc->vc_par[i] - 40] << 4)
|
|
| (vc->state.color & 0x0f);
|
|
break;
|
|
}
|
|
update_attr(vc);
|
|
}
|
|
|
|
static void respond_string(const char *p, size_t len, struct tty_port *port)
|
|
{
|
|
tty_insert_flip_string(port, p, len);
|
|
tty_schedule_flip(port);
|
|
}
|
|
|
|
static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
|
|
{
|
|
char buf[40];
|
|
int len;
|
|
|
|
len = sprintf(buf, "\033[%d;%dR", vc->state.y +
|
|
(vc->vc_decom ? vc->vc_top + 1 : 1),
|
|
vc->state.x + 1);
|
|
respond_string(buf, len, tty->port);
|
|
}
|
|
|
|
static inline void status_report(struct tty_struct *tty)
|
|
{
|
|
static const char teminal_ok[] = "\033[0n";
|
|
|
|
respond_string(teminal_ok, strlen(teminal_ok), tty->port);
|
|
}
|
|
|
|
static inline void respond_ID(struct tty_struct *tty)
|
|
{
|
|
/* terminal answer to an ESC-Z or csi0c query. */
|
|
static const char vt102_id[] = "\033[?6c";
|
|
|
|
respond_string(vt102_id, strlen(vt102_id), tty->port);
|
|
}
|
|
|
|
void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
|
|
{
|
|
char buf[8];
|
|
int len;
|
|
|
|
len = sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt),
|
|
(char)('!' + mrx), (char)('!' + mry));
|
|
respond_string(buf, len, tty->port);
|
|
}
|
|
|
|
/* invoked via ioctl(TIOCLINUX) and through set_selection_user */
|
|
int mouse_reporting(void)
|
|
{
|
|
return vc_cons[fg_console].d->vc_report_mouse;
|
|
}
|
|
|
|
/* console_lock is held */
|
|
static void set_mode(struct vc_data *vc, int on_off)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i <= vc->vc_npar; i++)
|
|
if (vc->vc_priv == EPdec) {
|
|
switch(vc->vc_par[i]) { /* DEC private modes set/reset */
|
|
case 1: /* Cursor keys send ^[Ox/^[[x */
|
|
if (on_off)
|
|
set_kbd(vc, decckm);
|
|
else
|
|
clr_kbd(vc, decckm);
|
|
break;
|
|
case 3: /* 80/132 mode switch unimplemented */
|
|
#if 0
|
|
vc_resize(deccolm ? 132 : 80, vc->vc_rows);
|
|
/* this alone does not suffice; some user mode
|
|
utility has to change the hardware regs */
|
|
#endif
|
|
break;
|
|
case 5: /* Inverted screen on/off */
|
|
if (vc->vc_decscnm != on_off) {
|
|
vc->vc_decscnm = on_off;
|
|
invert_screen(vc, 0,
|
|
vc->vc_screenbuf_size,
|
|
false);
|
|
update_attr(vc);
|
|
}
|
|
break;
|
|
case 6: /* Origin relative/absolute */
|
|
vc->vc_decom = on_off;
|
|
gotoxay(vc, 0, 0);
|
|
break;
|
|
case 7: /* Autowrap on/off */
|
|
vc->vc_decawm = on_off;
|
|
break;
|
|
case 8: /* Autorepeat on/off */
|
|
if (on_off)
|
|
set_kbd(vc, decarm);
|
|
else
|
|
clr_kbd(vc, decarm);
|
|
break;
|
|
case 9:
|
|
vc->vc_report_mouse = on_off ? 1 : 0;
|
|
break;
|
|
case 25: /* Cursor on/off */
|
|
vc->vc_deccm = on_off;
|
|
break;
|
|
case 1000:
|
|
vc->vc_report_mouse = on_off ? 2 : 0;
|
|
break;
|
|
}
|
|
} else {
|
|
switch(vc->vc_par[i]) { /* ANSI modes set/reset */
|
|
case 3: /* Monitor (display ctrls) */
|
|
vc->vc_disp_ctrl = on_off;
|
|
break;
|
|
case 4: /* Insert Mode on/off */
|
|
vc->vc_decim = on_off;
|
|
break;
|
|
case 20: /* Lf, Enter == CrLf/Lf */
|
|
if (on_off)
|
|
set_kbd(vc, lnm);
|
|
else
|
|
clr_kbd(vc, lnm);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* console_lock is held */
|
|
static void setterm_command(struct vc_data *vc)
|
|
{
|
|
switch (vc->vc_par[0]) {
|
|
case 1: /* set color for underline mode */
|
|
if (vc->vc_can_do_color && vc->vc_par[1] < 16) {
|
|
vc->vc_ulcolor = color_table[vc->vc_par[1]];
|
|
if (vc->state.underline)
|
|
update_attr(vc);
|
|
}
|
|
break;
|
|
case 2: /* set color for half intensity mode */
|
|
if (vc->vc_can_do_color && vc->vc_par[1] < 16) {
|
|
vc->vc_halfcolor = color_table[vc->vc_par[1]];
|
|
if (vc->state.intensity == VCI_HALF_BRIGHT)
|
|
update_attr(vc);
|
|
}
|
|
break;
|
|
case 8: /* store colors as defaults */
|
|
vc->vc_def_color = vc->vc_attr;
|
|
if (vc->vc_hi_font_mask == 0x100)
|
|
vc->vc_def_color >>= 1;
|
|
default_attr(vc);
|
|
update_attr(vc);
|
|
break;
|
|
case 9: /* set blanking interval */
|
|
blankinterval = min(vc->vc_par[1], 60U) * 60;
|
|
poke_blanked_console();
|
|
break;
|
|
case 10: /* set bell frequency in Hz */
|
|
if (vc->vc_npar >= 1)
|
|
vc->vc_bell_pitch = vc->vc_par[1];
|
|
else
|
|
vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
|
|
break;
|
|
case 11: /* set bell duration in msec */
|
|
if (vc->vc_npar >= 1)
|
|
vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
|
|
msecs_to_jiffies(vc->vc_par[1]) : 0;
|
|
else
|
|
vc->vc_bell_duration = DEFAULT_BELL_DURATION;
|
|
break;
|
|
case 12: /* bring specified console to the front */
|
|
if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
|
|
set_console(vc->vc_par[1] - 1);
|
|
break;
|
|
case 13: /* unblank the screen */
|
|
poke_blanked_console();
|
|
break;
|
|
case 14: /* set vesa powerdown interval */
|
|
vesa_off_interval = min(vc->vc_par[1], 60U) * 60 * HZ;
|
|
break;
|
|
case 15: /* activate the previous console */
|
|
set_console(last_console);
|
|
break;
|
|
case 16: /* set cursor blink duration in msec */
|
|
if (vc->vc_npar >= 1 && vc->vc_par[1] >= 50 &&
|
|
vc->vc_par[1] <= USHRT_MAX)
|
|
vc->vc_cur_blink_ms = vc->vc_par[1];
|
|
else
|
|
vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* console_lock is held */
|
|
static void csi_at(struct vc_data *vc, unsigned int nr)
|
|
{
|
|
if (nr > vc->vc_cols - vc->state.x)
|
|
nr = vc->vc_cols - vc->state.x;
|
|
else if (!nr)
|
|
nr = 1;
|
|
insert_char(vc, nr);
|
|
}
|
|
|
|
/* console_lock is held */
|
|
static void csi_L(struct vc_data *vc, unsigned int nr)
|
|
{
|
|
if (nr > vc->vc_rows - vc->state.y)
|
|
nr = vc->vc_rows - vc->state.y;
|
|
else if (!nr)
|
|
nr = 1;
|
|
con_scroll(vc, vc->state.y, vc->vc_bottom, SM_DOWN, nr);
|
|
vc->vc_need_wrap = 0;
|
|
}
|
|
|
|
/* console_lock is held */
|
|
static void csi_P(struct vc_data *vc, unsigned int nr)
|
|
{
|
|
if (nr > vc->vc_cols - vc->state.x)
|
|
nr = vc->vc_cols - vc->state.x;
|
|
else if (!nr)
|
|
nr = 1;
|
|
delete_char(vc, nr);
|
|
}
|
|
|
|
/* console_lock is held */
|
|
static void csi_M(struct vc_data *vc, unsigned int nr)
|
|
{
|
|
if (nr > vc->vc_rows - vc->state.y)
|
|
nr = vc->vc_rows - vc->state.y;
|
|
else if (!nr)
|
|
nr=1;
|
|
con_scroll(vc, vc->state.y, vc->vc_bottom, SM_UP, nr);
|
|
vc->vc_need_wrap = 0;
|
|
}
|
|
|
|
/* console_lock is held (except via vc_init->reset_terminal */
|
|
static void save_cur(struct vc_data *vc)
|
|
{
|
|
memcpy(&vc->saved_state, &vc->state, sizeof(vc->state));
|
|
}
|
|
|
|
/* console_lock is held */
|
|
static void restore_cur(struct vc_data *vc)
|
|
{
|
|
memcpy(&vc->state, &vc->saved_state, sizeof(vc->state));
|
|
|
|
gotoxy(vc, vc->state.x, vc->state.y);
|
|
vc->vc_translate = set_translate(vc->state.Gx_charset[vc->state.charset],
|
|
vc);
|
|
update_attr(vc);
|
|
vc->vc_need_wrap = 0;
|
|
}
|
|
|
|
enum { ESnormal, ESesc, ESsquare, ESgetpars, ESfunckey,
|
|
EShash, ESsetG0, ESsetG1, ESpercent, EScsiignore, ESnonstd,
|
|
ESpalette, ESosc };
|
|
|
|
/* console_lock is held (except via vc_init()) */
|
|
static void reset_terminal(struct vc_data *vc, int do_clear)
|
|
{
|
|
unsigned int i;
|
|
|
|
vc->vc_top = 0;
|
|
vc->vc_bottom = vc->vc_rows;
|
|
vc->vc_state = ESnormal;
|
|
vc->vc_priv = EPecma;
|
|
vc->vc_translate = set_translate(LAT1_MAP, vc);
|
|
vc->state.Gx_charset[0] = LAT1_MAP;
|
|
vc->state.Gx_charset[1] = GRAF_MAP;
|
|
vc->state.charset = 0;
|
|
vc->vc_need_wrap = 0;
|
|
vc->vc_report_mouse = 0;
|
|
vc->vc_utf = default_utf8;
|
|
vc->vc_utf_count = 0;
|
|
|
|
vc->vc_disp_ctrl = 0;
|
|
vc->vc_toggle_meta = 0;
|
|
|
|
vc->vc_decscnm = 0;
|
|
vc->vc_decom = 0;
|
|
vc->vc_decawm = 1;
|
|
vc->vc_deccm = global_cursor_default;
|
|
vc->vc_decim = 0;
|
|
|
|
vt_reset_keyboard(vc->vc_num);
|
|
|
|
vc->vc_cursor_type = cur_default;
|
|
vc->vc_complement_mask = vc->vc_s_complement_mask;
|
|
|
|
default_attr(vc);
|
|
update_attr(vc);
|
|
|
|
bitmap_zero(vc->vc_tab_stop, VC_TABSTOPS_COUNT);
|
|
for (i = 0; i < VC_TABSTOPS_COUNT; i += 8)
|
|
set_bit(i, vc->vc_tab_stop);
|
|
|
|
vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
|
|
vc->vc_bell_duration = DEFAULT_BELL_DURATION;
|
|
vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS;
|
|
|
|
gotoxy(vc, 0, 0);
|
|
save_cur(vc);
|
|
if (do_clear)
|
|
csi_J(vc, 2);
|
|
}
|
|
|
|
static void vc_setGx(struct vc_data *vc, unsigned int which, int c)
|
|
{
|
|
unsigned char *charset = &vc->state.Gx_charset[which];
|
|
|
|
switch (c) {
|
|
case '0':
|
|
*charset = GRAF_MAP;
|
|
break;
|
|
case 'B':
|
|
*charset = LAT1_MAP;
|
|
break;
|
|
case 'U':
|
|
*charset = IBMPC_MAP;
|
|
break;
|
|
case 'K':
|
|
*charset = USER_MAP;
|
|
break;
|
|
}
|
|
|
|
if (vc->state.charset == which)
|
|
vc->vc_translate = set_translate(*charset, vc);
|
|
}
|
|
|
|
/* console_lock is held */
|
|
static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
|
|
{
|
|
/*
|
|
* Control characters can be used in the _middle_
|
|
* of an escape sequence.
|
|
*/
|
|
if (vc->vc_state == ESosc && c>=8 && c<=13) /* ... except for OSC */
|
|
return;
|
|
switch (c) {
|
|
case 0:
|
|
return;
|
|
case 7:
|
|
if (vc->vc_state == ESosc)
|
|
vc->vc_state = ESnormal;
|
|
else if (vc->vc_bell_duration)
|
|
kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
|
|
return;
|
|
case 8:
|
|
bs(vc);
|
|
return;
|
|
case 9:
|
|
vc->vc_pos -= (vc->state.x << 1);
|
|
|
|
vc->state.x = find_next_bit(vc->vc_tab_stop,
|
|
min(vc->vc_cols - 1, VC_TABSTOPS_COUNT),
|
|
vc->state.x + 1);
|
|
if (vc->state.x >= VC_TABSTOPS_COUNT)
|
|
vc->state.x = vc->vc_cols - 1;
|
|
|
|
vc->vc_pos += (vc->state.x << 1);
|
|
notify_write(vc, '\t');
|
|
return;
|
|
case 10: case 11: case 12:
|
|
lf(vc);
|
|
if (!is_kbd(vc, lnm))
|
|
return;
|
|
fallthrough;
|
|
case 13:
|
|
cr(vc);
|
|
return;
|
|
case 14:
|
|
vc->state.charset = 1;
|
|
vc->vc_translate = set_translate(vc->state.Gx_charset[1], vc);
|
|
vc->vc_disp_ctrl = 1;
|
|
return;
|
|
case 15:
|
|
vc->state.charset = 0;
|
|
vc->vc_translate = set_translate(vc->state.Gx_charset[0], vc);
|
|
vc->vc_disp_ctrl = 0;
|
|
return;
|
|
case 24: case 26:
|
|
vc->vc_state = ESnormal;
|
|
return;
|
|
case 27:
|
|
vc->vc_state = ESesc;
|
|
return;
|
|
case 127:
|
|
del(vc);
|
|
return;
|
|
case 128+27:
|
|
vc->vc_state = ESsquare;
|
|
return;
|
|
}
|
|
switch(vc->vc_state) {
|
|
case ESesc:
|
|
vc->vc_state = ESnormal;
|
|
switch (c) {
|
|
case '[':
|
|
vc->vc_state = ESsquare;
|
|
return;
|
|
case ']':
|
|
vc->vc_state = ESnonstd;
|
|
return;
|
|
case '%':
|
|
vc->vc_state = ESpercent;
|
|
return;
|
|
case 'E':
|
|
cr(vc);
|
|
lf(vc);
|
|
return;
|
|
case 'M':
|
|
ri(vc);
|
|
return;
|
|
case 'D':
|
|
lf(vc);
|
|
return;
|
|
case 'H':
|
|
if (vc->state.x < VC_TABSTOPS_COUNT)
|
|
set_bit(vc->state.x, vc->vc_tab_stop);
|
|
return;
|
|
case 'Z':
|
|
respond_ID(tty);
|
|
return;
|
|
case '7':
|
|
save_cur(vc);
|
|
return;
|
|
case '8':
|
|
restore_cur(vc);
|
|
return;
|
|
case '(':
|
|
vc->vc_state = ESsetG0;
|
|
return;
|
|
case ')':
|
|
vc->vc_state = ESsetG1;
|
|
return;
|
|
case '#':
|
|
vc->vc_state = EShash;
|
|
return;
|
|
case 'c':
|
|
reset_terminal(vc, 1);
|
|
return;
|
|
case '>': /* Numeric keypad */
|
|
clr_kbd(vc, kbdapplic);
|
|
return;
|
|
case '=': /* Appl. keypad */
|
|
set_kbd(vc, kbdapplic);
|
|
return;
|
|
}
|
|
return;
|
|
case ESnonstd:
|
|
if (c=='P') { /* palette escape sequence */
|
|
for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
|
|
vc->vc_par[vc->vc_npar] = 0;
|
|
vc->vc_npar = 0;
|
|
vc->vc_state = ESpalette;
|
|
return;
|
|
} else if (c=='R') { /* reset palette */
|
|
reset_palette(vc);
|
|
vc->vc_state = ESnormal;
|
|
} else if (c>='0' && c<='9')
|
|
vc->vc_state = ESosc;
|
|
else
|
|
vc->vc_state = ESnormal;
|
|
return;
|
|
case ESpalette:
|
|
if (isxdigit(c)) {
|
|
vc->vc_par[vc->vc_npar++] = hex_to_bin(c);
|
|
if (vc->vc_npar == 7) {
|
|
int i = vc->vc_par[0] * 3, j = 1;
|
|
vc->vc_palette[i] = 16 * vc->vc_par[j++];
|
|
vc->vc_palette[i++] += vc->vc_par[j++];
|
|
vc->vc_palette[i] = 16 * vc->vc_par[j++];
|
|
vc->vc_palette[i++] += vc->vc_par[j++];
|
|
vc->vc_palette[i] = 16 * vc->vc_par[j++];
|
|
vc->vc_palette[i] += vc->vc_par[j];
|
|
set_palette(vc);
|
|
vc->vc_state = ESnormal;
|
|
}
|
|
} else
|
|
vc->vc_state = ESnormal;
|
|
return;
|
|
case ESsquare:
|
|
for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
|
|
vc->vc_par[vc->vc_npar] = 0;
|
|
vc->vc_npar = 0;
|
|
vc->vc_state = ESgetpars;
|
|
if (c == '[') { /* Function key */
|
|
vc->vc_state=ESfunckey;
|
|
return;
|
|
}
|
|
switch (c) {
|
|
case '?':
|
|
vc->vc_priv = EPdec;
|
|
return;
|
|
case '>':
|
|
vc->vc_priv = EPgt;
|
|
return;
|
|
case '=':
|
|
vc->vc_priv = EPeq;
|
|
return;
|
|
case '<':
|
|
vc->vc_priv = EPlt;
|
|
return;
|
|
}
|
|
vc->vc_priv = EPecma;
|
|
fallthrough;
|
|
case ESgetpars:
|
|
if (c == ';' && vc->vc_npar < NPAR - 1) {
|
|
vc->vc_npar++;
|
|
return;
|
|
} else if (c>='0' && c<='9') {
|
|
vc->vc_par[vc->vc_npar] *= 10;
|
|
vc->vc_par[vc->vc_npar] += c - '0';
|
|
return;
|
|
}
|
|
if (c >= 0x20 && c <= 0x3f) { /* 0x2x, 0x3a and 0x3c - 0x3f */
|
|
vc->vc_state = EScsiignore;
|
|
return;
|
|
}
|
|
vc->vc_state = ESnormal;
|
|
switch(c) {
|
|
case 'h':
|
|
if (vc->vc_priv <= EPdec)
|
|
set_mode(vc, 1);
|
|
return;
|
|
case 'l':
|
|
if (vc->vc_priv <= EPdec)
|
|
set_mode(vc, 0);
|
|
return;
|
|
case 'c':
|
|
if (vc->vc_priv == EPdec) {
|
|
if (vc->vc_par[0])
|
|
vc->vc_cursor_type =
|
|
CUR_MAKE(vc->vc_par[0],
|
|
vc->vc_par[1],
|
|
vc->vc_par[2]);
|
|
else
|
|
vc->vc_cursor_type = cur_default;
|
|
return;
|
|
}
|
|
break;
|
|
case 'm':
|
|
if (vc->vc_priv == EPdec) {
|
|
clear_selection();
|
|
if (vc->vc_par[0])
|
|
vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
|
|
else
|
|
vc->vc_complement_mask = vc->vc_s_complement_mask;
|
|
return;
|
|
}
|
|
break;
|
|
case 'n':
|
|
if (vc->vc_priv == EPecma) {
|
|
if (vc->vc_par[0] == 5)
|
|
status_report(tty);
|
|
else if (vc->vc_par[0] == 6)
|
|
cursor_report(vc, tty);
|
|
}
|
|
return;
|
|
}
|
|
if (vc->vc_priv != EPecma) {
|
|
vc->vc_priv = EPecma;
|
|
return;
|
|
}
|
|
switch(c) {
|
|
case 'G': case '`':
|
|
if (vc->vc_par[0])
|
|
vc->vc_par[0]--;
|
|
gotoxy(vc, vc->vc_par[0], vc->state.y);
|
|
return;
|
|
case 'A':
|
|
if (!vc->vc_par[0])
|
|
vc->vc_par[0]++;
|
|
gotoxy(vc, vc->state.x, vc->state.y - vc->vc_par[0]);
|
|
return;
|
|
case 'B': case 'e':
|
|
if (!vc->vc_par[0])
|
|
vc->vc_par[0]++;
|
|
gotoxy(vc, vc->state.x, vc->state.y + vc->vc_par[0]);
|
|
return;
|
|
case 'C': case 'a':
|
|
if (!vc->vc_par[0])
|
|
vc->vc_par[0]++;
|
|
gotoxy(vc, vc->state.x + vc->vc_par[0], vc->state.y);
|
|
return;
|
|
case 'D':
|
|
if (!vc->vc_par[0])
|
|
vc->vc_par[0]++;
|
|
gotoxy(vc, vc->state.x - vc->vc_par[0], vc->state.y);
|
|
return;
|
|
case 'E':
|
|
if (!vc->vc_par[0])
|
|
vc->vc_par[0]++;
|
|
gotoxy(vc, 0, vc->state.y + vc->vc_par[0]);
|
|
return;
|
|
case 'F':
|
|
if (!vc->vc_par[0])
|
|
vc->vc_par[0]++;
|
|
gotoxy(vc, 0, vc->state.y - vc->vc_par[0]);
|
|
return;
|
|
case 'd':
|
|
if (vc->vc_par[0])
|
|
vc->vc_par[0]--;
|
|
gotoxay(vc, vc->state.x ,vc->vc_par[0]);
|
|
return;
|
|
case 'H': case 'f':
|
|
if (vc->vc_par[0])
|
|
vc->vc_par[0]--;
|
|
if (vc->vc_par[1])
|
|
vc->vc_par[1]--;
|
|
gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
|
|
return;
|
|
case 'J':
|
|
csi_J(vc, vc->vc_par[0]);
|
|
return;
|
|
case 'K':
|
|
csi_K(vc, vc->vc_par[0]);
|
|
return;
|
|
case 'L':
|
|
csi_L(vc, vc->vc_par[0]);
|
|
return;
|
|
case 'M':
|
|
csi_M(vc, vc->vc_par[0]);
|
|
return;
|
|
case 'P':
|
|
csi_P(vc, vc->vc_par[0]);
|
|
return;
|
|
case 'c':
|
|
if (!vc->vc_par[0])
|
|
respond_ID(tty);
|
|
return;
|
|
case 'g':
|
|
if (!vc->vc_par[0] && vc->state.x < VC_TABSTOPS_COUNT)
|
|
set_bit(vc->state.x, vc->vc_tab_stop);
|
|
else if (vc->vc_par[0] == 3)
|
|
bitmap_zero(vc->vc_tab_stop, VC_TABSTOPS_COUNT);
|
|
return;
|
|
case 'm':
|
|
csi_m(vc);
|
|
return;
|
|
case 'q': /* DECLL - but only 3 leds */
|
|
/* map 0,1,2,3 to 0,1,2,4 */
|
|
if (vc->vc_par[0] < 4)
|
|
vt_set_led_state(vc->vc_num,
|
|
(vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
|
|
return;
|
|
case 'r':
|
|
if (!vc->vc_par[0])
|
|
vc->vc_par[0]++;
|
|
if (!vc->vc_par[1])
|
|
vc->vc_par[1] = vc->vc_rows;
|
|
/* Minimum allowed region is 2 lines */
|
|
if (vc->vc_par[0] < vc->vc_par[1] &&
|
|
vc->vc_par[1] <= vc->vc_rows) {
|
|
vc->vc_top = vc->vc_par[0] - 1;
|
|
vc->vc_bottom = vc->vc_par[1];
|
|
gotoxay(vc, 0, 0);
|
|
}
|
|
return;
|
|
case 's':
|
|
save_cur(vc);
|
|
return;
|
|
case 'u':
|
|
restore_cur(vc);
|
|
return;
|
|
case 'X':
|
|
csi_X(vc, vc->vc_par[0]);
|
|
return;
|
|
case '@':
|
|
csi_at(vc, vc->vc_par[0]);
|
|
return;
|
|
case ']': /* setterm functions */
|
|
setterm_command(vc);
|
|
return;
|
|
}
|
|
return;
|
|
case EScsiignore:
|
|
if (c >= 20 && c <= 0x3f)
|
|
return;
|
|
vc->vc_state = ESnormal;
|
|
return;
|
|
case ESpercent:
|
|
vc->vc_state = ESnormal;
|
|
switch (c) {
|
|
case '@': /* defined in ISO 2022 */
|
|
vc->vc_utf = 0;
|
|
return;
|
|
case 'G': /* prelim official escape code */
|
|
case '8': /* retained for compatibility */
|
|
vc->vc_utf = 1;
|
|
return;
|
|
}
|
|
return;
|
|
case ESfunckey:
|
|
vc->vc_state = ESnormal;
|
|
return;
|
|
case EShash:
|
|
vc->vc_state = ESnormal;
|
|
if (c == '8') {
|
|
/* DEC screen alignment test. kludge :-) */
|
|
vc->vc_video_erase_char =
|
|
(vc->vc_video_erase_char & 0xff00) | 'E';
|
|
csi_J(vc, 2);
|
|
vc->vc_video_erase_char =
|
|
(vc->vc_video_erase_char & 0xff00) | ' ';
|
|
do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
|
|
}
|
|
return;
|
|
case ESsetG0:
|
|
vc_setGx(vc, 0, c);
|
|
vc->vc_state = ESnormal;
|
|
return;
|
|
case ESsetG1:
|
|
vc_setGx(vc, 1, c);
|
|
vc->vc_state = ESnormal;
|
|
return;
|
|
case ESosc:
|
|
return;
|
|
default:
|
|
vc->vc_state = ESnormal;
|
|
}
|
|
}
|
|
|
|
/* is_double_width() is based on the wcwidth() implementation by
|
|
* Markus Kuhn -- 2007-05-26 (Unicode 5.0)
|
|
* Latest version: https://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
|
|
*/
|
|
struct interval {
|
|
uint32_t first;
|
|
uint32_t last;
|
|
};
|
|
|
|
static int ucs_cmp(const void *key, const void *elt)
|
|
{
|
|
uint32_t ucs = *(uint32_t *)key;
|
|
struct interval e = *(struct interval *) elt;
|
|
|
|
if (ucs > e.last)
|
|
return 1;
|
|
else if (ucs < e.first)
|
|
return -1;
|
|
return 0;
|
|
}
|
|
|
|
static int is_double_width(uint32_t ucs)
|
|
{
|
|
static const struct interval double_width[] = {
|
|
{ 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
|
|
{ 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
|
|
{ 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
|
|
{ 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
|
|
};
|
|
if (ucs < double_width[0].first ||
|
|
ucs > double_width[ARRAY_SIZE(double_width) - 1].last)
|
|
return 0;
|
|
|
|
return bsearch(&ucs, double_width, ARRAY_SIZE(double_width),
|
|
sizeof(struct interval), ucs_cmp) != NULL;
|
|
}
|
|
|
|
struct vc_draw_region {
|
|
unsigned long from, to;
|
|
int x;
|
|
};
|
|
|
|
static void con_flush(struct vc_data *vc, struct vc_draw_region *draw)
|
|
{
|
|
if (draw->x < 0)
|
|
return;
|
|
|
|
vc->vc_sw->con_putcs(vc, (u16 *)draw->from,
|
|
(u16 *)draw->to - (u16 *)draw->from, vc->state.y,
|
|
draw->x);
|
|
draw->x = -1;
|
|
}
|
|
|
|
static inline int vc_translate_ascii(const struct vc_data *vc, int c)
|
|
{
|
|
if (IS_ENABLED(CONFIG_CONSOLE_TRANSLATIONS)) {
|
|
if (vc->vc_toggle_meta)
|
|
c |= 0x80;
|
|
|
|
return vc->vc_translate[c];
|
|
}
|
|
|
|
return c;
|
|
}
|
|
|
|
|
|
/**
|
|
* vc_sanitize_unicode -- Replace invalid Unicode code points with U+FFFD
|
|
* @c: the received character, or U+FFFD for invalid sequences.
|
|
*/
|
|
static inline int vc_sanitize_unicode(const int c)
|
|
{
|
|
if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
|
|
return 0xfffd;
|
|
|
|
return c;
|
|
}
|
|
|
|
/**
|
|
* vc_translate_unicode -- Combine UTF-8 into Unicode in @vc_utf_char
|
|
* @vc: virtual console
|
|
* @c: character to translate
|
|
* @rescan: we return true if we need more (continuation) data
|
|
*
|
|
* @vc_utf_char is the being-constructed unicode character.
|
|
* @vc_utf_count is the number of continuation bytes still expected to arrive.
|
|
* @vc_npar is the number of continuation bytes arrived so far.
|
|
*/
|
|
static int vc_translate_unicode(struct vc_data *vc, int c, bool *rescan)
|
|
{
|
|
static const u32 utf8_length_changes[] = {
|
|
0x0000007f, 0x000007ff, 0x0000ffff,
|
|
0x001fffff, 0x03ffffff, 0x7fffffff
|
|
};
|
|
|
|
/* Continuation byte received */
|
|
if ((c & 0xc0) == 0x80) {
|
|
/* Unexpected continuation byte? */
|
|
if (!vc->vc_utf_count)
|
|
return 0xfffd;
|
|
|
|
vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
|
|
vc->vc_npar++;
|
|
if (--vc->vc_utf_count)
|
|
goto need_more_bytes;
|
|
|
|
/* Got a whole character */
|
|
c = vc->vc_utf_char;
|
|
/* Reject overlong sequences */
|
|
if (c <= utf8_length_changes[vc->vc_npar - 1] ||
|
|
c > utf8_length_changes[vc->vc_npar])
|
|
return 0xfffd;
|
|
|
|
return vc_sanitize_unicode(c);
|
|
}
|
|
|
|
/* Single ASCII byte or first byte of a sequence received */
|
|
if (vc->vc_utf_count) {
|
|
/* Continuation byte expected */
|
|
*rescan = true;
|
|
vc->vc_utf_count = 0;
|
|
return 0xfffd;
|
|
}
|
|
|
|
/* Nothing to do if an ASCII byte was received */
|
|
if (c <= 0x7f)
|
|
return c;
|
|
|
|
/* First byte of a multibyte sequence received */
|
|
vc->vc_npar = 0;
|
|
if ((c & 0xe0) == 0xc0) {
|
|
vc->vc_utf_count = 1;
|
|
vc->vc_utf_char = (c & 0x1f);
|
|
} else if ((c & 0xf0) == 0xe0) {
|
|
vc->vc_utf_count = 2;
|
|
vc->vc_utf_char = (c & 0x0f);
|
|
} else if ((c & 0xf8) == 0xf0) {
|
|
vc->vc_utf_count = 3;
|
|
vc->vc_utf_char = (c & 0x07);
|
|
} else if ((c & 0xfc) == 0xf8) {
|
|
vc->vc_utf_count = 4;
|
|
vc->vc_utf_char = (c & 0x03);
|
|
} else if ((c & 0xfe) == 0xfc) {
|
|
vc->vc_utf_count = 5;
|
|
vc->vc_utf_char = (c & 0x01);
|
|
} else {
|
|
/* 254 and 255 are invalid */
|
|
return 0xfffd;
|
|
}
|
|
|
|
need_more_bytes:
|
|
return -1;
|
|
}
|
|
|
|
static int vc_translate(struct vc_data *vc, int *c, bool *rescan)
|
|
{
|
|
/* Do no translation at all in control states */
|
|
if (vc->vc_state != ESnormal)
|
|
return *c;
|
|
|
|
if (vc->vc_utf && !vc->vc_disp_ctrl)
|
|
return *c = vc_translate_unicode(vc, *c, rescan);
|
|
|
|
/* no utf or alternate charset mode */
|
|
return vc_translate_ascii(vc, *c);
|
|
}
|
|
|
|
static inline unsigned char vc_invert_attr(const struct vc_data *vc)
|
|
{
|
|
if (!vc->vc_can_do_color)
|
|
return vc->vc_attr ^ 0x08;
|
|
|
|
if (vc->vc_hi_font_mask == 0x100)
|
|
return (vc->vc_attr & 0x11) |
|
|
((vc->vc_attr & 0xe0) >> 4) |
|
|
((vc->vc_attr & 0x0e) << 4);
|
|
|
|
return (vc->vc_attr & 0x88) |
|
|
((vc->vc_attr & 0x70) >> 4) |
|
|
((vc->vc_attr & 0x07) << 4);
|
|
}
|
|
|
|
static bool vc_is_control(struct vc_data *vc, int tc, int c)
|
|
{
|
|
/*
|
|
* A bitmap for codes <32. A bit of 1 indicates that the code
|
|
* corresponding to that bit number invokes some special action (such
|
|
* as cursor movement) and should not be displayed as a glyph unless
|
|
* the disp_ctrl mode is explicitly enabled.
|
|
*/
|
|
static const u32 CTRL_ACTION = 0x0d00ff81;
|
|
/* Cannot be overridden by disp_ctrl */
|
|
static const u32 CTRL_ALWAYS = 0x0800f501;
|
|
|
|
if (vc->vc_state != ESnormal)
|
|
return true;
|
|
|
|
if (!tc)
|
|
return true;
|
|
|
|
/*
|
|
* If the original code was a control character we only allow a glyph
|
|
* to be displayed if the code is not normally used (such as for cursor
|
|
* movement) or if the disp_ctrl mode has been explicitly enabled.
|
|
* Certain characters (as given by the CTRL_ALWAYS bitmap) are always
|
|
* displayed as control characters, as the console would be pretty
|
|
* useless without them; to display an arbitrary font position use the
|
|
* direct-to-font zone in UTF-8 mode.
|
|
*/
|
|
if (c < 32) {
|
|
if (vc->vc_disp_ctrl)
|
|
return CTRL_ALWAYS & BIT(c);
|
|
else
|
|
return vc->vc_utf || (CTRL_ACTION & BIT(c));
|
|
}
|
|
|
|
if (c == 127 && !vc->vc_disp_ctrl)
|
|
return true;
|
|
|
|
if (c == 128 + 27)
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
static int vc_con_write_normal(struct vc_data *vc, int tc, int c,
|
|
struct vc_draw_region *draw)
|
|
{
|
|
int next_c;
|
|
unsigned char vc_attr = vc->vc_attr;
|
|
u16 himask = vc->vc_hi_font_mask, charmask = himask ? 0x1ff : 0xff;
|
|
u8 width = 1;
|
|
bool inverse = false;
|
|
|
|
if (vc->vc_utf && !vc->vc_disp_ctrl) {
|
|
if (is_double_width(c))
|
|
width = 2;
|
|
}
|
|
|
|
/* Now try to find out how to display it */
|
|
tc = conv_uni_to_pc(vc, tc);
|
|
if (tc & ~charmask) {
|
|
if (tc == -1 || tc == -2)
|
|
return -1; /* nothing to display */
|
|
|
|
/* Glyph not found */
|
|
if ((!vc->vc_utf || vc->vc_disp_ctrl || c < 128) &&
|
|
!(c & ~charmask)) {
|
|
/*
|
|
* In legacy mode use the glyph we get by a 1:1
|
|
* mapping.
|
|
* This would make absolutely no sense with Unicode in
|
|
* mind, but do this for ASCII characters since a font
|
|
* may lack Unicode mapping info and we don't want to
|
|
* end up with having question marks only.
|
|
*/
|
|
tc = c;
|
|
} else {
|
|
/*
|
|
* Display U+FFFD. If it's not found, display an inverse
|
|
* question mark.
|
|
*/
|
|
tc = conv_uni_to_pc(vc, 0xfffd);
|
|
if (tc < 0) {
|
|
inverse = true;
|
|
tc = conv_uni_to_pc(vc, '?');
|
|
if (tc < 0)
|
|
tc = '?';
|
|
|
|
vc_attr = vc_invert_attr(vc);
|
|
con_flush(vc, draw);
|
|
}
|
|
}
|
|
}
|
|
|
|
next_c = c;
|
|
while (1) {
|
|
if (vc->vc_need_wrap || vc->vc_decim)
|
|
con_flush(vc, draw);
|
|
if (vc->vc_need_wrap) {
|
|
cr(vc);
|
|
lf(vc);
|
|
}
|
|
if (vc->vc_decim)
|
|
insert_char(vc, 1);
|
|
vc_uniscr_putc(vc, next_c);
|
|
|
|
if (himask)
|
|
tc = ((tc & 0x100) ? himask : 0) |
|
|
(tc & 0xff);
|
|
tc |= (vc_attr << 8) & ~himask;
|
|
|
|
scr_writew(tc, (u16 *)vc->vc_pos);
|
|
|
|
if (con_should_update(vc) && draw->x < 0) {
|
|
draw->x = vc->state.x;
|
|
draw->from = vc->vc_pos;
|
|
}
|
|
if (vc->state.x == vc->vc_cols - 1) {
|
|
vc->vc_need_wrap = vc->vc_decawm;
|
|
draw->to = vc->vc_pos + 2;
|
|
} else {
|
|
vc->state.x++;
|
|
draw->to = (vc->vc_pos += 2);
|
|
}
|
|
|
|
if (!--width)
|
|
break;
|
|
|
|
/* A space is printed in the second column */
|
|
tc = conv_uni_to_pc(vc, ' ');
|
|
if (tc < 0)
|
|
tc = ' ';
|
|
next_c = ' ';
|
|
}
|
|
notify_write(vc, c);
|
|
|
|
if (inverse)
|
|
con_flush(vc, draw);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* acquires console_lock */
|
|
static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
|
|
{
|
|
struct vc_draw_region draw = {
|
|
.x = -1,
|
|
};
|
|
int c, tc, n = 0;
|
|
unsigned int currcons;
|
|
struct vc_data *vc;
|
|
struct vt_notifier_param param;
|
|
bool rescan;
|
|
|
|
if (in_interrupt())
|
|
return count;
|
|
|
|
console_lock();
|
|
vc = tty->driver_data;
|
|
if (vc == NULL) {
|
|
pr_err("vt: argh, driver_data is NULL !\n");
|
|
console_unlock();
|
|
return 0;
|
|
}
|
|
|
|
currcons = vc->vc_num;
|
|
if (!vc_cons_allocated(currcons)) {
|
|
/* could this happen? */
|
|
pr_warn_once("con_write: tty %d not allocated\n", currcons+1);
|
|
console_unlock();
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* undraw cursor first */
|
|
if (con_is_fg(vc))
|
|
hide_cursor(vc);
|
|
|
|
param.vc = vc;
|
|
|
|
while (!tty->flow.stopped && count) {
|
|
int orig = *buf;
|
|
buf++;
|
|
n++;
|
|
count--;
|
|
rescan_last_byte:
|
|
c = orig;
|
|
rescan = false;
|
|
|
|
tc = vc_translate(vc, &c, &rescan);
|
|
if (tc == -1)
|
|
continue;
|
|
|
|
param.c = tc;
|
|
if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE,
|
|
¶m) == NOTIFY_STOP)
|
|
continue;
|
|
|
|
if (vc_is_control(vc, tc, c)) {
|
|
con_flush(vc, &draw);
|
|
do_con_trol(tty, vc, orig);
|
|
continue;
|
|
}
|
|
|
|
if (vc_con_write_normal(vc, tc, c, &draw) < 0)
|
|
continue;
|
|
|
|
if (rescan)
|
|
goto rescan_last_byte;
|
|
}
|
|
con_flush(vc, &draw);
|
|
vc_uniscr_debug_check(vc);
|
|
console_conditional_schedule();
|
|
notify_update(vc);
|
|
console_unlock();
|
|
return n;
|
|
}
|
|
|
|
/*
|
|
* This is the console switching callback.
|
|
*
|
|
* Doing console switching in a process context allows
|
|
* us to do the switches asynchronously (needed when we want
|
|
* to switch due to a keyboard interrupt). Synchronization
|
|
* with other console code and prevention of re-entrancy is
|
|
* ensured with console_lock.
|
|
*/
|
|
static void console_callback(struct work_struct *ignored)
|
|
{
|
|
console_lock();
|
|
|
|
if (want_console >= 0) {
|
|
if (want_console != fg_console &&
|
|
vc_cons_allocated(want_console)) {
|
|
hide_cursor(vc_cons[fg_console].d);
|
|
change_console(vc_cons[want_console].d);
|
|
/* we only changed when the console had already
|
|
been allocated - a new console is not created
|
|
in an interrupt routine */
|
|
}
|
|
want_console = -1;
|
|
}
|
|
if (do_poke_blanked_console) { /* do not unblank for a LED change */
|
|
do_poke_blanked_console = 0;
|
|
poke_blanked_console();
|
|
}
|
|
if (scrollback_delta) {
|
|
struct vc_data *vc = vc_cons[fg_console].d;
|
|
clear_selection();
|
|
if (vc->vc_mode == KD_TEXT && vc->vc_sw->con_scrolldelta)
|
|
vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
|
|
scrollback_delta = 0;
|
|
}
|
|
if (blank_timer_expired) {
|
|
do_blank_screen(0);
|
|
blank_timer_expired = 0;
|
|
}
|
|
notify_update(vc_cons[fg_console].d);
|
|
|
|
console_unlock();
|
|
}
|
|
|
|
int set_console(int nr)
|
|
{
|
|
struct vc_data *vc = vc_cons[fg_console].d;
|
|
|
|
if (!vc_cons_allocated(nr) || vt_dont_switch ||
|
|
(vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
|
|
|
|
/*
|
|
* Console switch will fail in console_callback() or
|
|
* change_console() so there is no point scheduling
|
|
* the callback
|
|
*
|
|
* Existing set_console() users don't check the return
|
|
* value so this shouldn't break anything
|
|
*/
|
|
return -EINVAL;
|
|
}
|
|
|
|
want_console = nr;
|
|
schedule_console_callback();
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct tty_driver *console_driver;
|
|
|
|
#ifdef CONFIG_VT_CONSOLE
|
|
|
|
/**
|
|
* vt_kmsg_redirect() - Sets/gets the kernel message console
|
|
* @new: The new virtual terminal number or -1 if the console should stay
|
|
* unchanged
|
|
*
|
|
* By default, the kernel messages are always printed on the current virtual
|
|
* console. However, the user may modify that default with the
|
|
* TIOCL_SETKMSGREDIRECT ioctl call.
|
|
*
|
|
* This function sets the kernel message console to be @new. It returns the old
|
|
* virtual console number. The virtual terminal number 0 (both as parameter and
|
|
* return value) means no redirection (i.e. always printed on the currently
|
|
* active console).
|
|
*
|
|
* The parameter -1 means that only the current console is returned, but the
|
|
* value is not modified. You may use the macro vt_get_kmsg_redirect() in that
|
|
* case to make the code more understandable.
|
|
*
|
|
* When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores
|
|
* the parameter and always returns 0.
|
|
*/
|
|
int vt_kmsg_redirect(int new)
|
|
{
|
|
static int kmsg_con;
|
|
|
|
if (new != -1)
|
|
return xchg(&kmsg_con, new);
|
|
else
|
|
return kmsg_con;
|
|
}
|
|
|
|
/*
|
|
* Console on virtual terminal
|
|
*
|
|
* The console must be locked when we get here.
|
|
*/
|
|
|
|
static void vt_console_print(struct console *co, const char *b, unsigned count)
|
|
{
|
|
struct vc_data *vc = vc_cons[fg_console].d;
|
|
unsigned char c;
|
|
static DEFINE_SPINLOCK(printing_lock);
|
|
const ushort *start;
|
|
ushort start_x, cnt;
|
|
int kmsg_console;
|
|
|
|
/* console busy or not yet initialized */
|
|
if (!printable)
|
|
return;
|
|
if (!spin_trylock(&printing_lock))
|
|
return;
|
|
|
|
kmsg_console = vt_get_kmsg_redirect();
|
|
if (kmsg_console && vc_cons_allocated(kmsg_console - 1))
|
|
vc = vc_cons[kmsg_console - 1].d;
|
|
|
|
if (!vc_cons_allocated(fg_console)) {
|
|
/* impossible */
|
|
/* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
|
|
goto quit;
|
|
}
|
|
|
|
if (vc->vc_mode != KD_TEXT)
|
|
goto quit;
|
|
|
|
/* undraw cursor first */
|
|
if (con_is_fg(vc))
|
|
hide_cursor(vc);
|
|
|
|
start = (ushort *)vc->vc_pos;
|
|
start_x = vc->state.x;
|
|
cnt = 0;
|
|
while (count--) {
|
|
c = *b++;
|
|
if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
|
|
if (cnt && con_is_visible(vc))
|
|
vc->vc_sw->con_putcs(vc, start, cnt, vc->state.y, start_x);
|
|
cnt = 0;
|
|
if (c == 8) { /* backspace */
|
|
bs(vc);
|
|
start = (ushort *)vc->vc_pos;
|
|
start_x = vc->state.x;
|
|
continue;
|
|
}
|
|
if (c != 13)
|
|
lf(vc);
|
|
cr(vc);
|
|
start = (ushort *)vc->vc_pos;
|
|
start_x = vc->state.x;
|
|
if (c == 10 || c == 13)
|
|
continue;
|
|
}
|
|
vc_uniscr_putc(vc, c);
|
|
scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
|
|
notify_write(vc, c);
|
|
cnt++;
|
|
if (vc->state.x == vc->vc_cols - 1) {
|
|
vc->vc_need_wrap = 1;
|
|
} else {
|
|
vc->vc_pos += 2;
|
|
vc->state.x++;
|
|
}
|
|
}
|
|
if (cnt && con_is_visible(vc))
|
|
vc->vc_sw->con_putcs(vc, start, cnt, vc->state.y, start_x);
|
|
set_cursor(vc);
|
|
notify_update(vc);
|
|
|
|
quit:
|
|
spin_unlock(&printing_lock);
|
|
}
|
|
|
|
static struct tty_driver *vt_console_device(struct console *c, int *index)
|
|
{
|
|
*index = c->index ? c->index-1 : fg_console;
|
|
return console_driver;
|
|
}
|
|
|
|
static struct console vt_console_driver = {
|
|
.name = "tty",
|
|
.write = vt_console_print,
|
|
.device = vt_console_device,
|
|
.unblank = unblank_screen,
|
|
.flags = CON_PRINTBUFFER,
|
|
.index = -1,
|
|
};
|
|
#endif
|
|
|
|
/*
|
|
* Handling of Linux-specific VC ioctls
|
|
*/
|
|
|
|
/*
|
|
* Generally a bit racy with respect to console_lock();.
|
|
*
|
|
* There are some functions which don't need it.
|
|
*
|
|
* There are some functions which can sleep for arbitrary periods
|
|
* (paste_selection) but we don't need the lock there anyway.
|
|
*
|
|
* set_selection_user has locking, and definitely needs it
|
|
*/
|
|
|
|
int tioclinux(struct tty_struct *tty, unsigned long arg)
|
|
{
|
|
char type, data;
|
|
char __user *p = (char __user *)arg;
|
|
int lines;
|
|
int ret;
|
|
|
|
if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
if (get_user(type, p))
|
|
return -EFAULT;
|
|
ret = 0;
|
|
|
|
switch (type)
|
|
{
|
|
case TIOCL_SETSEL:
|
|
ret = set_selection_user((struct tiocl_selection
|
|
__user *)(p+1), tty);
|
|
break;
|
|
case TIOCL_PASTESEL:
|
|
ret = paste_selection(tty);
|
|
break;
|
|
case TIOCL_UNBLANKSCREEN:
|
|
console_lock();
|
|
unblank_screen();
|
|
console_unlock();
|
|
break;
|
|
case TIOCL_SELLOADLUT:
|
|
console_lock();
|
|
ret = sel_loadlut(p);
|
|
console_unlock();
|
|
break;
|
|
case TIOCL_GETSHIFTSTATE:
|
|
|
|
/*
|
|
* Make it possible to react to Shift+Mousebutton.
|
|
* Note that 'shift_state' is an undocumented
|
|
* kernel-internal variable; programs not closely
|
|
* related to the kernel should not use this.
|
|
*/
|
|
data = vt_get_shift_state();
|
|
ret = put_user(data, p);
|
|
break;
|
|
case TIOCL_GETMOUSEREPORTING:
|
|
console_lock(); /* May be overkill */
|
|
data = mouse_reporting();
|
|
console_unlock();
|
|
ret = put_user(data, p);
|
|
break;
|
|
case TIOCL_SETVESABLANK:
|
|
console_lock();
|
|
ret = set_vesa_blanking(p);
|
|
console_unlock();
|
|
break;
|
|
case TIOCL_GETKMSGREDIRECT:
|
|
data = vt_get_kmsg_redirect();
|
|
ret = put_user(data, p);
|
|
break;
|
|
case TIOCL_SETKMSGREDIRECT:
|
|
if (!capable(CAP_SYS_ADMIN)) {
|
|
ret = -EPERM;
|
|
} else {
|
|
if (get_user(data, p+1))
|
|
ret = -EFAULT;
|
|
else
|
|
vt_kmsg_redirect(data);
|
|
}
|
|
break;
|
|
case TIOCL_GETFGCONSOLE:
|
|
/* No locking needed as this is a transiently
|
|
correct return anyway if the caller hasn't
|
|
disabled switching */
|
|
ret = fg_console;
|
|
break;
|
|
case TIOCL_SCROLLCONSOLE:
|
|
if (get_user(lines, (s32 __user *)(p+4))) {
|
|
ret = -EFAULT;
|
|
} else {
|
|
/* Need the console lock here. Note that lots
|
|
of other calls need fixing before the lock
|
|
is actually useful ! */
|
|
console_lock();
|
|
scrollfront(vc_cons[fg_console].d, lines);
|
|
console_unlock();
|
|
ret = 0;
|
|
}
|
|
break;
|
|
case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
|
|
console_lock();
|
|
ignore_poke = 1;
|
|
do_blank_screen(0);
|
|
console_unlock();
|
|
break;
|
|
case TIOCL_BLANKEDSCREEN:
|
|
ret = console_blanked;
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* /dev/ttyN handling
|
|
*/
|
|
|
|
static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
|
|
{
|
|
int retval;
|
|
|
|
retval = do_con_write(tty, buf, count);
|
|
con_flush_chars(tty);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static int con_put_char(struct tty_struct *tty, unsigned char ch)
|
|
{
|
|
return do_con_write(tty, &ch, 1);
|
|
}
|
|
|
|
static unsigned int con_write_room(struct tty_struct *tty)
|
|
{
|
|
if (tty->flow.stopped)
|
|
return 0;
|
|
return 32768; /* No limit, really; we're not buffering */
|
|
}
|
|
|
|
/*
|
|
* con_throttle and con_unthrottle are only used for
|
|
* paste_selection(), which has to stuff in a large number of
|
|
* characters...
|
|
*/
|
|
static void con_throttle(struct tty_struct *tty)
|
|
{
|
|
}
|
|
|
|
static void con_unthrottle(struct tty_struct *tty)
|
|
{
|
|
struct vc_data *vc = tty->driver_data;
|
|
|
|
wake_up_interruptible(&vc->paste_wait);
|
|
}
|
|
|
|
/*
|
|
* Turn the Scroll-Lock LED on when the tty is stopped
|
|
*/
|
|
static void con_stop(struct tty_struct *tty)
|
|
{
|
|
int console_num;
|
|
if (!tty)
|
|
return;
|
|
console_num = tty->index;
|
|
if (!vc_cons_allocated(console_num))
|
|
return;
|
|
vt_kbd_con_stop(console_num);
|
|
}
|
|
|
|
/*
|
|
* Turn the Scroll-Lock LED off when the console is started
|
|
*/
|
|
static void con_start(struct tty_struct *tty)
|
|
{
|
|
int console_num;
|
|
if (!tty)
|
|
return;
|
|
console_num = tty->index;
|
|
if (!vc_cons_allocated(console_num))
|
|
return;
|
|
vt_kbd_con_start(console_num);
|
|
}
|
|
|
|
static void con_flush_chars(struct tty_struct *tty)
|
|
{
|
|
struct vc_data *vc;
|
|
|
|
if (in_interrupt()) /* from flush_to_ldisc */
|
|
return;
|
|
|
|
/* if we race with con_close(), vt may be null */
|
|
console_lock();
|
|
vc = tty->driver_data;
|
|
if (vc)
|
|
set_cursor(vc);
|
|
console_unlock();
|
|
}
|
|
|
|
/*
|
|
* Allocate the console screen memory.
|
|
*/
|
|
static int con_install(struct tty_driver *driver, struct tty_struct *tty)
|
|
{
|
|
unsigned int currcons = tty->index;
|
|
struct vc_data *vc;
|
|
int ret;
|
|
|
|
console_lock();
|
|
ret = vc_allocate(currcons);
|
|
if (ret)
|
|
goto unlock;
|
|
|
|
vc = vc_cons[currcons].d;
|
|
|
|
/* Still being freed */
|
|
if (vc->port.tty) {
|
|
ret = -ERESTARTSYS;
|
|
goto unlock;
|
|
}
|
|
|
|
ret = tty_port_install(&vc->port, driver, tty);
|
|
if (ret)
|
|
goto unlock;
|
|
|
|
tty->driver_data = vc;
|
|
vc->port.tty = tty;
|
|
tty_port_get(&vc->port);
|
|
|
|
if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
|
|
tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
|
|
tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
|
|
}
|
|
if (vc->vc_utf)
|
|
tty->termios.c_iflag |= IUTF8;
|
|
else
|
|
tty->termios.c_iflag &= ~IUTF8;
|
|
unlock:
|
|
console_unlock();
|
|
return ret;
|
|
}
|
|
|
|
static int con_open(struct tty_struct *tty, struct file *filp)
|
|
{
|
|
/* everything done in install */
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void con_close(struct tty_struct *tty, struct file *filp)
|
|
{
|
|
/* Nothing to do - we defer to shutdown */
|
|
}
|
|
|
|
static void con_shutdown(struct tty_struct *tty)
|
|
{
|
|
struct vc_data *vc = tty->driver_data;
|
|
BUG_ON(vc == NULL);
|
|
console_lock();
|
|
vc->port.tty = NULL;
|
|
console_unlock();
|
|
}
|
|
|
|
static void con_cleanup(struct tty_struct *tty)
|
|
{
|
|
struct vc_data *vc = tty->driver_data;
|
|
|
|
tty_port_put(&vc->port);
|
|
}
|
|
|
|
static int default_color = 7; /* white */
|
|
static int default_italic_color = 2; // green (ASCII)
|
|
static int default_underline_color = 3; // cyan (ASCII)
|
|
module_param_named(color, default_color, int, S_IRUGO | S_IWUSR);
|
|
module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
|
|
module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
|
|
|
|
static void vc_init(struct vc_data *vc, unsigned int rows,
|
|
unsigned int cols, int do_clear)
|
|
{
|
|
int j, k ;
|
|
|
|
vc->vc_cols = cols;
|
|
vc->vc_rows = rows;
|
|
vc->vc_size_row = cols << 1;
|
|
vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
|
|
|
|
set_origin(vc);
|
|
vc->vc_pos = vc->vc_origin;
|
|
reset_vc(vc);
|
|
for (j=k=0; j<16; j++) {
|
|
vc->vc_palette[k++] = default_red[j] ;
|
|
vc->vc_palette[k++] = default_grn[j] ;
|
|
vc->vc_palette[k++] = default_blu[j] ;
|
|
}
|
|
vc->vc_def_color = default_color;
|
|
vc->vc_ulcolor = default_underline_color;
|
|
vc->vc_itcolor = default_italic_color;
|
|
vc->vc_halfcolor = 0x08; /* grey */
|
|
init_waitqueue_head(&vc->paste_wait);
|
|
reset_terminal(vc, do_clear);
|
|
}
|
|
|
|
/*
|
|
* This routine initializes console interrupts, and does nothing
|
|
* else. If you want the screen to clear, call tty_write with
|
|
* the appropriate escape-sequence.
|
|
*/
|
|
|
|
static int __init con_init(void)
|
|
{
|
|
const char *display_desc = NULL;
|
|
struct vc_data *vc;
|
|
unsigned int currcons = 0, i;
|
|
|
|
console_lock();
|
|
|
|
if (!conswitchp)
|
|
conswitchp = &dummy_con;
|
|
display_desc = conswitchp->con_startup();
|
|
if (!display_desc) {
|
|
fg_console = 0;
|
|
console_unlock();
|
|
return 0;
|
|
}
|
|
|
|
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
|
|
struct con_driver *con_driver = ®istered_con_driver[i];
|
|
|
|
if (con_driver->con == NULL) {
|
|
con_driver->con = conswitchp;
|
|
con_driver->desc = display_desc;
|
|
con_driver->flag = CON_DRIVER_FLAG_INIT;
|
|
con_driver->first = 0;
|
|
con_driver->last = MAX_NR_CONSOLES - 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < MAX_NR_CONSOLES; i++)
|
|
con_driver_map[i] = conswitchp;
|
|
|
|
if (blankinterval) {
|
|
blank_state = blank_normal_wait;
|
|
mod_timer(&console_timer, jiffies + (blankinterval * HZ));
|
|
}
|
|
|
|
for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
|
|
vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT);
|
|
INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
|
|
tty_port_init(&vc->port);
|
|
visual_init(vc, currcons, 1);
|
|
/* Assuming vc->vc_{cols,rows,screenbuf_size} are sane here. */
|
|
vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT);
|
|
vc_init(vc, vc->vc_rows, vc->vc_cols,
|
|
currcons || !vc->vc_sw->con_save_screen);
|
|
}
|
|
currcons = fg_console = 0;
|
|
master_display_fg = vc = vc_cons[currcons].d;
|
|
set_origin(vc);
|
|
save_screen(vc);
|
|
gotoxy(vc, vc->state.x, vc->state.y);
|
|
csi_J(vc, 0);
|
|
update_screen(vc);
|
|
pr_info("Console: %s %s %dx%d\n",
|
|
vc->vc_can_do_color ? "colour" : "mono",
|
|
display_desc, vc->vc_cols, vc->vc_rows);
|
|
printable = 1;
|
|
|
|
console_unlock();
|
|
|
|
#ifdef CONFIG_VT_CONSOLE
|
|
register_console(&vt_console_driver);
|
|
#endif
|
|
return 0;
|
|
}
|
|
console_initcall(con_init);
|
|
|
|
static const struct tty_operations con_ops = {
|
|
.install = con_install,
|
|
.open = con_open,
|
|
.close = con_close,
|
|
.write = con_write,
|
|
.write_room = con_write_room,
|
|
.put_char = con_put_char,
|
|
.flush_chars = con_flush_chars,
|
|
.ioctl = vt_ioctl,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = vt_compat_ioctl,
|
|
#endif
|
|
.stop = con_stop,
|
|
.start = con_start,
|
|
.throttle = con_throttle,
|
|
.unthrottle = con_unthrottle,
|
|
.resize = vt_resize,
|
|
.shutdown = con_shutdown,
|
|
.cleanup = con_cleanup,
|
|
};
|
|
|
|
static struct cdev vc0_cdev;
|
|
|
|
static ssize_t show_tty_active(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
return sprintf(buf, "tty%d\n", fg_console + 1);
|
|
}
|
|
static DEVICE_ATTR(active, S_IRUGO, show_tty_active, NULL);
|
|
|
|
static struct attribute *vt_dev_attrs[] = {
|
|
&dev_attr_active.attr,
|
|
NULL
|
|
};
|
|
|
|
ATTRIBUTE_GROUPS(vt_dev);
|
|
|
|
int __init vty_init(const struct file_operations *console_fops)
|
|
{
|
|
cdev_init(&vc0_cdev, console_fops);
|
|
if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
|
|
register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
|
|
panic("Couldn't register /dev/tty0 driver\n");
|
|
tty0dev = device_create_with_groups(tty_class, NULL,
|
|
MKDEV(TTY_MAJOR, 0), NULL,
|
|
vt_dev_groups, "tty0");
|
|
if (IS_ERR(tty0dev))
|
|
tty0dev = NULL;
|
|
|
|
vcs_init();
|
|
|
|
console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
|
|
if (!console_driver)
|
|
panic("Couldn't allocate console driver\n");
|
|
|
|
console_driver->name = "tty";
|
|
console_driver->name_base = 1;
|
|
console_driver->major = TTY_MAJOR;
|
|
console_driver->minor_start = 1;
|
|
console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
|
|
console_driver->init_termios = tty_std_termios;
|
|
if (default_utf8)
|
|
console_driver->init_termios.c_iflag |= IUTF8;
|
|
console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
|
|
tty_set_operations(console_driver, &con_ops);
|
|
if (tty_register_driver(console_driver))
|
|
panic("Couldn't register console driver\n");
|
|
kbd_init();
|
|
console_map_init();
|
|
#ifdef CONFIG_MDA_CONSOLE
|
|
mda_console_init();
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
#ifndef VT_SINGLE_DRIVER
|
|
|
|
static struct class *vtconsole_class;
|
|
|
|
static int do_bind_con_driver(const struct consw *csw, int first, int last,
|
|
int deflt)
|
|
{
|
|
struct module *owner = csw->owner;
|
|
const char *desc = NULL;
|
|
struct con_driver *con_driver;
|
|
int i, j = -1, k = -1, retval = -ENODEV;
|
|
|
|
if (!try_module_get(owner))
|
|
return -ENODEV;
|
|
|
|
WARN_CONSOLE_UNLOCKED();
|
|
|
|
/* check if driver is registered */
|
|
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
|
|
con_driver = ®istered_con_driver[i];
|
|
|
|
if (con_driver->con == csw) {
|
|
desc = con_driver->desc;
|
|
retval = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (retval)
|
|
goto err;
|
|
|
|
if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
|
|
csw->con_startup();
|
|
con_driver->flag |= CON_DRIVER_FLAG_INIT;
|
|
}
|
|
|
|
if (deflt) {
|
|
if (conswitchp)
|
|
module_put(conswitchp->owner);
|
|
|
|
__module_get(owner);
|
|
conswitchp = csw;
|
|
}
|
|
|
|
first = max(first, con_driver->first);
|
|
last = min(last, con_driver->last);
|
|
|
|
for (i = first; i <= last; i++) {
|
|
int old_was_color;
|
|
struct vc_data *vc = vc_cons[i].d;
|
|
|
|
if (con_driver_map[i])
|
|
module_put(con_driver_map[i]->owner);
|
|
__module_get(owner);
|
|
con_driver_map[i] = csw;
|
|
|
|
if (!vc || !vc->vc_sw)
|
|
continue;
|
|
|
|
j = i;
|
|
|
|
if (con_is_visible(vc)) {
|
|
k = i;
|
|
save_screen(vc);
|
|
}
|
|
|
|
old_was_color = vc->vc_can_do_color;
|
|
vc->vc_sw->con_deinit(vc);
|
|
vc->vc_origin = (unsigned long)vc->vc_screenbuf;
|
|
visual_init(vc, i, 0);
|
|
set_origin(vc);
|
|
update_attr(vc);
|
|
|
|
/* If the console changed between mono <-> color, then
|
|
* the attributes in the screenbuf will be wrong. The
|
|
* following resets all attributes to something sane.
|
|
*/
|
|
if (old_was_color != vc->vc_can_do_color)
|
|
clear_buffer_attributes(vc);
|
|
}
|
|
|
|
pr_info("Console: switching ");
|
|
if (!deflt)
|
|
pr_cont("consoles %d-%d ", first + 1, last + 1);
|
|
if (j >= 0) {
|
|
struct vc_data *vc = vc_cons[j].d;
|
|
|
|
pr_cont("to %s %s %dx%d\n",
|
|
vc->vc_can_do_color ? "colour" : "mono",
|
|
desc, vc->vc_cols, vc->vc_rows);
|
|
|
|
if (k >= 0) {
|
|
vc = vc_cons[k].d;
|
|
update_screen(vc);
|
|
}
|
|
} else {
|
|
pr_cont("to %s\n", desc);
|
|
}
|
|
|
|
retval = 0;
|
|
err:
|
|
module_put(owner);
|
|
return retval;
|
|
};
|
|
|
|
|
|
#ifdef CONFIG_VT_HW_CONSOLE_BINDING
|
|
int do_unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
|
|
{
|
|
struct module *owner = csw->owner;
|
|
const struct consw *defcsw = NULL;
|
|
struct con_driver *con_driver = NULL, *con_back = NULL;
|
|
int i, retval = -ENODEV;
|
|
|
|
if (!try_module_get(owner))
|
|
return -ENODEV;
|
|
|
|
WARN_CONSOLE_UNLOCKED();
|
|
|
|
/* check if driver is registered and if it is unbindable */
|
|
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
|
|
con_driver = ®istered_con_driver[i];
|
|
|
|
if (con_driver->con == csw &&
|
|
con_driver->flag & CON_DRIVER_FLAG_MODULE) {
|
|
retval = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (retval)
|
|
goto err;
|
|
|
|
retval = -ENODEV;
|
|
|
|
/* check if backup driver exists */
|
|
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
|
|
con_back = ®istered_con_driver[i];
|
|
|
|
if (con_back->con && con_back->con != csw) {
|
|
defcsw = con_back->con;
|
|
retval = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (retval)
|
|
goto err;
|
|
|
|
if (!con_is_bound(csw))
|
|
goto err;
|
|
|
|
first = max(first, con_driver->first);
|
|
last = min(last, con_driver->last);
|
|
|
|
for (i = first; i <= last; i++) {
|
|
if (con_driver_map[i] == csw) {
|
|
module_put(csw->owner);
|
|
con_driver_map[i] = NULL;
|
|
}
|
|
}
|
|
|
|
if (!con_is_bound(defcsw)) {
|
|
const struct consw *defconsw = conswitchp;
|
|
|
|
defcsw->con_startup();
|
|
con_back->flag |= CON_DRIVER_FLAG_INIT;
|
|
/*
|
|
* vgacon may change the default driver to point
|
|
* to dummycon, we restore it here...
|
|
*/
|
|
conswitchp = defconsw;
|
|
}
|
|
|
|
if (!con_is_bound(csw))
|
|
con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
|
|
|
|
/* ignore return value, binding should not fail */
|
|
do_bind_con_driver(defcsw, first, last, deflt);
|
|
err:
|
|
module_put(owner);
|
|
return retval;
|
|
|
|
}
|
|
EXPORT_SYMBOL_GPL(do_unbind_con_driver);
|
|
|
|
static int vt_bind(struct con_driver *con)
|
|
{
|
|
const struct consw *defcsw = NULL, *csw = NULL;
|
|
int i, more = 1, first = -1, last = -1, deflt = 0;
|
|
|
|
if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE))
|
|
goto err;
|
|
|
|
csw = con->con;
|
|
|
|
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
|
|
struct con_driver *con = ®istered_con_driver[i];
|
|
|
|
if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
|
|
defcsw = con->con;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!defcsw)
|
|
goto err;
|
|
|
|
while (more) {
|
|
more = 0;
|
|
|
|
for (i = con->first; i <= con->last; i++) {
|
|
if (con_driver_map[i] == defcsw) {
|
|
if (first == -1)
|
|
first = i;
|
|
last = i;
|
|
more = 1;
|
|
} else if (first != -1)
|
|
break;
|
|
}
|
|
|
|
if (first == 0 && last == MAX_NR_CONSOLES -1)
|
|
deflt = 1;
|
|
|
|
if (first != -1)
|
|
do_bind_con_driver(csw, first, last, deflt);
|
|
|
|
first = -1;
|
|
last = -1;
|
|
deflt = 0;
|
|
}
|
|
|
|
err:
|
|
return 0;
|
|
}
|
|
|
|
static int vt_unbind(struct con_driver *con)
|
|
{
|
|
const struct consw *csw = NULL;
|
|
int i, more = 1, first = -1, last = -1, deflt = 0;
|
|
int ret;
|
|
|
|
if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE))
|
|
goto err;
|
|
|
|
csw = con->con;
|
|
|
|
while (more) {
|
|
more = 0;
|
|
|
|
for (i = con->first; i <= con->last; i++) {
|
|
if (con_driver_map[i] == csw) {
|
|
if (first == -1)
|
|
first = i;
|
|
last = i;
|
|
more = 1;
|
|
} else if (first != -1)
|
|
break;
|
|
}
|
|
|
|
if (first == 0 && last == MAX_NR_CONSOLES -1)
|
|
deflt = 1;
|
|
|
|
if (first != -1) {
|
|
ret = do_unbind_con_driver(csw, first, last, deflt);
|
|
if (ret != 0)
|
|
return ret;
|
|
}
|
|
|
|
first = -1;
|
|
last = -1;
|
|
deflt = 0;
|
|
}
|
|
|
|
err:
|
|
return 0;
|
|
}
|
|
#else
|
|
static inline int vt_bind(struct con_driver *con)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline int vt_unbind(struct con_driver *con)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_VT_HW_CONSOLE_BINDING */
|
|
|
|
static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct con_driver *con = dev_get_drvdata(dev);
|
|
int bind = simple_strtoul(buf, NULL, 0);
|
|
|
|
console_lock();
|
|
|
|
if (bind)
|
|
vt_bind(con);
|
|
else
|
|
vt_unbind(con);
|
|
|
|
console_unlock();
|
|
|
|
return count;
|
|
}
|
|
|
|
static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct con_driver *con = dev_get_drvdata(dev);
|
|
int bind;
|
|
|
|
console_lock();
|
|
bind = con_is_bound(con->con);
|
|
console_unlock();
|
|
|
|
return snprintf(buf, PAGE_SIZE, "%i\n", bind);
|
|
}
|
|
|
|
static ssize_t show_name(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct con_driver *con = dev_get_drvdata(dev);
|
|
|
|
return snprintf(buf, PAGE_SIZE, "%s %s\n",
|
|
(con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
|
|
con->desc);
|
|
|
|
}
|
|
|
|
static DEVICE_ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind);
|
|
static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
|
|
|
|
static struct attribute *con_dev_attrs[] = {
|
|
&dev_attr_bind.attr,
|
|
&dev_attr_name.attr,
|
|
NULL
|
|
};
|
|
|
|
ATTRIBUTE_GROUPS(con_dev);
|
|
|
|
static int vtconsole_init_device(struct con_driver *con)
|
|
{
|
|
con->flag |= CON_DRIVER_FLAG_ATTR;
|
|
return 0;
|
|
}
|
|
|
|
static void vtconsole_deinit_device(struct con_driver *con)
|
|
{
|
|
con->flag &= ~CON_DRIVER_FLAG_ATTR;
|
|
}
|
|
|
|
/**
|
|
* con_is_bound - checks if driver is bound to the console
|
|
* @csw: console driver
|
|
*
|
|
* RETURNS: zero if unbound, nonzero if bound
|
|
*
|
|
* Drivers can call this and if zero, they should release
|
|
* all resources allocated on con_startup()
|
|
*/
|
|
int con_is_bound(const struct consw *csw)
|
|
{
|
|
int i, bound = 0;
|
|
|
|
WARN_CONSOLE_UNLOCKED();
|
|
|
|
for (i = 0; i < MAX_NR_CONSOLES; i++) {
|
|
if (con_driver_map[i] == csw) {
|
|
bound = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return bound;
|
|
}
|
|
EXPORT_SYMBOL(con_is_bound);
|
|
|
|
/**
|
|
* con_is_visible - checks whether the current console is visible
|
|
* @vc: virtual console
|
|
*
|
|
* RETURNS: zero if not visible, nonzero if visible
|
|
*/
|
|
bool con_is_visible(const struct vc_data *vc)
|
|
{
|
|
WARN_CONSOLE_UNLOCKED();
|
|
|
|
return *vc->vc_display_fg == vc;
|
|
}
|
|
EXPORT_SYMBOL(con_is_visible);
|
|
|
|
/**
|
|
* con_debug_enter - prepare the console for the kernel debugger
|
|
* @vc: virtual console
|
|
*
|
|
* Called when the console is taken over by the kernel debugger, this
|
|
* function needs to save the current console state, then put the console
|
|
* into a state suitable for the kernel debugger.
|
|
*
|
|
* RETURNS:
|
|
* Zero on success, nonzero if a failure occurred when trying to prepare
|
|
* the console for the debugger.
|
|
*/
|
|
int con_debug_enter(struct vc_data *vc)
|
|
{
|
|
int ret = 0;
|
|
|
|
saved_fg_console = fg_console;
|
|
saved_last_console = last_console;
|
|
saved_want_console = want_console;
|
|
saved_vc_mode = vc->vc_mode;
|
|
saved_console_blanked = console_blanked;
|
|
vc->vc_mode = KD_TEXT;
|
|
console_blanked = 0;
|
|
if (vc->vc_sw->con_debug_enter)
|
|
ret = vc->vc_sw->con_debug_enter(vc);
|
|
#ifdef CONFIG_KGDB_KDB
|
|
/* Set the initial LINES variable if it is not already set */
|
|
if (vc->vc_rows < 999) {
|
|
int linecount;
|
|
char lns[4];
|
|
const char *setargs[3] = {
|
|
"set",
|
|
"LINES",
|
|
lns,
|
|
};
|
|
if (kdbgetintenv(setargs[0], &linecount)) {
|
|
snprintf(lns, 4, "%i", vc->vc_rows);
|
|
kdb_set(2, setargs);
|
|
}
|
|
}
|
|
if (vc->vc_cols < 999) {
|
|
int colcount;
|
|
char cols[4];
|
|
const char *setargs[3] = {
|
|
"set",
|
|
"COLUMNS",
|
|
cols,
|
|
};
|
|
if (kdbgetintenv(setargs[0], &colcount)) {
|
|
snprintf(cols, 4, "%i", vc->vc_cols);
|
|
kdb_set(2, setargs);
|
|
}
|
|
}
|
|
#endif /* CONFIG_KGDB_KDB */
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(con_debug_enter);
|
|
|
|
/**
|
|
* con_debug_leave - restore console state
|
|
*
|
|
* Restore the console state to what it was before the kernel debugger
|
|
* was invoked.
|
|
*
|
|
* RETURNS:
|
|
* Zero on success, nonzero if a failure occurred when trying to restore
|
|
* the console.
|
|
*/
|
|
int con_debug_leave(void)
|
|
{
|
|
struct vc_data *vc;
|
|
int ret = 0;
|
|
|
|
fg_console = saved_fg_console;
|
|
last_console = saved_last_console;
|
|
want_console = saved_want_console;
|
|
console_blanked = saved_console_blanked;
|
|
vc_cons[fg_console].d->vc_mode = saved_vc_mode;
|
|
|
|
vc = vc_cons[fg_console].d;
|
|
if (vc->vc_sw->con_debug_leave)
|
|
ret = vc->vc_sw->con_debug_leave(vc);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(con_debug_leave);
|
|
|
|
static int do_register_con_driver(const struct consw *csw, int first, int last)
|
|
{
|
|
struct module *owner = csw->owner;
|
|
struct con_driver *con_driver;
|
|
const char *desc;
|
|
int i, retval;
|
|
|
|
WARN_CONSOLE_UNLOCKED();
|
|
|
|
if (!try_module_get(owner))
|
|
return -ENODEV;
|
|
|
|
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
|
|
con_driver = ®istered_con_driver[i];
|
|
|
|
/* already registered */
|
|
if (con_driver->con == csw) {
|
|
retval = -EBUSY;
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
desc = csw->con_startup();
|
|
if (!desc) {
|
|
retval = -ENODEV;
|
|
goto err;
|
|
}
|
|
|
|
retval = -EINVAL;
|
|
|
|
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
|
|
con_driver = ®istered_con_driver[i];
|
|
|
|
if (con_driver->con == NULL &&
|
|
!(con_driver->flag & CON_DRIVER_FLAG_ZOMBIE)) {
|
|
con_driver->con = csw;
|
|
con_driver->desc = desc;
|
|
con_driver->node = i;
|
|
con_driver->flag = CON_DRIVER_FLAG_MODULE |
|
|
CON_DRIVER_FLAG_INIT;
|
|
con_driver->first = first;
|
|
con_driver->last = last;
|
|
retval = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (retval)
|
|
goto err;
|
|
|
|
con_driver->dev =
|
|
device_create_with_groups(vtconsole_class, NULL,
|
|
MKDEV(0, con_driver->node),
|
|
con_driver, con_dev_groups,
|
|
"vtcon%i", con_driver->node);
|
|
if (IS_ERR(con_driver->dev)) {
|
|
pr_warn("Unable to create device for %s; errno = %ld\n",
|
|
con_driver->desc, PTR_ERR(con_driver->dev));
|
|
con_driver->dev = NULL;
|
|
} else {
|
|
vtconsole_init_device(con_driver);
|
|
}
|
|
|
|
err:
|
|
module_put(owner);
|
|
return retval;
|
|
}
|
|
|
|
|
|
/**
|
|
* do_unregister_con_driver - unregister console driver from console layer
|
|
* @csw: console driver
|
|
*
|
|
* DESCRIPTION: All drivers that registers to the console layer must
|
|
* call this function upon exit, or if the console driver is in a state
|
|
* where it won't be able to handle console services, such as the
|
|
* framebuffer console without loaded framebuffer drivers.
|
|
*
|
|
* The driver must unbind first prior to unregistration.
|
|
*/
|
|
int do_unregister_con_driver(const struct consw *csw)
|
|
{
|
|
int i;
|
|
|
|
/* cannot unregister a bound driver */
|
|
if (con_is_bound(csw))
|
|
return -EBUSY;
|
|
|
|
if (csw == conswitchp)
|
|
return -EINVAL;
|
|
|
|
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
|
|
struct con_driver *con_driver = ®istered_con_driver[i];
|
|
|
|
if (con_driver->con == csw) {
|
|
/*
|
|
* Defer the removal of the sysfs entries since that
|
|
* will acquire the kernfs s_active lock and we can't
|
|
* acquire this lock while holding the console lock:
|
|
* the unbind sysfs entry imposes already the opposite
|
|
* order. Reset con already here to prevent any later
|
|
* lookup to succeed and mark this slot as zombie, so
|
|
* it won't get reused until we complete the removal
|
|
* in the deferred work.
|
|
*/
|
|
con_driver->con = NULL;
|
|
con_driver->flag = CON_DRIVER_FLAG_ZOMBIE;
|
|
schedule_work(&con_driver_unregister_work);
|
|
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return -ENODEV;
|
|
}
|
|
EXPORT_SYMBOL_GPL(do_unregister_con_driver);
|
|
|
|
static void con_driver_unregister_callback(struct work_struct *ignored)
|
|
{
|
|
int i;
|
|
|
|
console_lock();
|
|
|
|
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
|
|
struct con_driver *con_driver = ®istered_con_driver[i];
|
|
|
|
if (!(con_driver->flag & CON_DRIVER_FLAG_ZOMBIE))
|
|
continue;
|
|
|
|
console_unlock();
|
|
|
|
vtconsole_deinit_device(con_driver);
|
|
device_destroy(vtconsole_class, MKDEV(0, con_driver->node));
|
|
|
|
console_lock();
|
|
|
|
if (WARN_ON_ONCE(con_driver->con))
|
|
con_driver->con = NULL;
|
|
con_driver->desc = NULL;
|
|
con_driver->dev = NULL;
|
|
con_driver->node = 0;
|
|
WARN_ON_ONCE(con_driver->flag != CON_DRIVER_FLAG_ZOMBIE);
|
|
con_driver->flag = 0;
|
|
con_driver->first = 0;
|
|
con_driver->last = 0;
|
|
}
|
|
|
|
console_unlock();
|
|
}
|
|
|
|
/*
|
|
* If we support more console drivers, this function is used
|
|
* when a driver wants to take over some existing consoles
|
|
* and become default driver for newly opened ones.
|
|
*
|
|
* do_take_over_console is basically a register followed by bind
|
|
*/
|
|
int do_take_over_console(const struct consw *csw, int first, int last, int deflt)
|
|
{
|
|
int err;
|
|
|
|
err = do_register_con_driver(csw, first, last);
|
|
/*
|
|
* If we get an busy error we still want to bind the console driver
|
|
* and return success, as we may have unbound the console driver
|
|
* but not unregistered it.
|
|
*/
|
|
if (err == -EBUSY)
|
|
err = 0;
|
|
if (!err)
|
|
do_bind_con_driver(csw, first, last, deflt);
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL_GPL(do_take_over_console);
|
|
|
|
|
|
/*
|
|
* give_up_console is a wrapper to unregister_con_driver. It will only
|
|
* work if driver is fully unbound.
|
|
*/
|
|
void give_up_console(const struct consw *csw)
|
|
{
|
|
console_lock();
|
|
do_unregister_con_driver(csw);
|
|
console_unlock();
|
|
}
|
|
|
|
static int __init vtconsole_class_init(void)
|
|
{
|
|
int i;
|
|
|
|
vtconsole_class = class_create(THIS_MODULE, "vtconsole");
|
|
if (IS_ERR(vtconsole_class)) {
|
|
pr_warn("Unable to create vt console class; errno = %ld\n",
|
|
PTR_ERR(vtconsole_class));
|
|
vtconsole_class = NULL;
|
|
}
|
|
|
|
/* Add system drivers to sysfs */
|
|
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
|
|
struct con_driver *con = ®istered_con_driver[i];
|
|
|
|
if (con->con && !con->dev) {
|
|
con->dev =
|
|
device_create_with_groups(vtconsole_class, NULL,
|
|
MKDEV(0, con->node),
|
|
con, con_dev_groups,
|
|
"vtcon%i", con->node);
|
|
|
|
if (IS_ERR(con->dev)) {
|
|
pr_warn("Unable to create device for %s; errno = %ld\n",
|
|
con->desc, PTR_ERR(con->dev));
|
|
con->dev = NULL;
|
|
} else {
|
|
vtconsole_init_device(con);
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
postcore_initcall(vtconsole_class_init);
|
|
|
|
#endif
|
|
|
|
/*
|
|
* Screen blanking
|
|
*/
|
|
|
|
static int set_vesa_blanking(char __user *p)
|
|
{
|
|
unsigned int mode;
|
|
|
|
if (get_user(mode, p + 1))
|
|
return -EFAULT;
|
|
|
|
vesa_blank_mode = (mode < 4) ? mode : 0;
|
|
return 0;
|
|
}
|
|
|
|
void do_blank_screen(int entering_gfx)
|
|
{
|
|
struct vc_data *vc = vc_cons[fg_console].d;
|
|
int i;
|
|
|
|
might_sleep();
|
|
|
|
WARN_CONSOLE_UNLOCKED();
|
|
|
|
if (console_blanked) {
|
|
if (blank_state == blank_vesa_wait) {
|
|
blank_state = blank_off;
|
|
vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
|
|
}
|
|
return;
|
|
}
|
|
|
|
/* entering graphics mode? */
|
|
if (entering_gfx) {
|
|
hide_cursor(vc);
|
|
save_screen(vc);
|
|
vc->vc_sw->con_blank(vc, -1, 1);
|
|
console_blanked = fg_console + 1;
|
|
blank_state = blank_off;
|
|
set_origin(vc);
|
|
return;
|
|
}
|
|
|
|
blank_state = blank_off;
|
|
|
|
/* don't blank graphics */
|
|
if (vc->vc_mode != KD_TEXT) {
|
|
console_blanked = fg_console + 1;
|
|
return;
|
|
}
|
|
|
|
hide_cursor(vc);
|
|
del_timer_sync(&console_timer);
|
|
blank_timer_expired = 0;
|
|
|
|
save_screen(vc);
|
|
/* In case we need to reset origin, blanking hook returns 1 */
|
|
i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
|
|
console_blanked = fg_console + 1;
|
|
if (i)
|
|
set_origin(vc);
|
|
|
|
if (console_blank_hook && console_blank_hook(1))
|
|
return;
|
|
|
|
if (vesa_off_interval && vesa_blank_mode) {
|
|
blank_state = blank_vesa_wait;
|
|
mod_timer(&console_timer, jiffies + vesa_off_interval);
|
|
}
|
|
vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num);
|
|
}
|
|
EXPORT_SYMBOL(do_blank_screen);
|
|
|
|
/*
|
|
* Called by timer as well as from vt_console_driver
|
|
*/
|
|
void do_unblank_screen(int leaving_gfx)
|
|
{
|
|
struct vc_data *vc;
|
|
|
|
/* This should now always be called from a "sane" (read: can schedule)
|
|
* context for the sake of the low level drivers, except in the special
|
|
* case of oops_in_progress
|
|
*/
|
|
if (!oops_in_progress)
|
|
might_sleep();
|
|
|
|
WARN_CONSOLE_UNLOCKED();
|
|
|
|
ignore_poke = 0;
|
|
if (!console_blanked)
|
|
return;
|
|
if (!vc_cons_allocated(fg_console)) {
|
|
/* impossible */
|
|
pr_warn("unblank_screen: tty %d not allocated ??\n",
|
|
fg_console + 1);
|
|
return;
|
|
}
|
|
vc = vc_cons[fg_console].d;
|
|
if (vc->vc_mode != KD_TEXT)
|
|
return; /* but leave console_blanked != 0 */
|
|
|
|
if (blankinterval) {
|
|
mod_timer(&console_timer, jiffies + (blankinterval * HZ));
|
|
blank_state = blank_normal_wait;
|
|
}
|
|
|
|
console_blanked = 0;
|
|
if (vc->vc_sw->con_blank(vc, 0, leaving_gfx))
|
|
/* Low-level driver cannot restore -> do it ourselves */
|
|
update_screen(vc);
|
|
if (console_blank_hook)
|
|
console_blank_hook(0);
|
|
set_palette(vc);
|
|
set_cursor(vc);
|
|
vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num);
|
|
}
|
|
EXPORT_SYMBOL(do_unblank_screen);
|
|
|
|
/*
|
|
* This is called by the outside world to cause a forced unblank, mostly for
|
|
* oopses. Currently, I just call do_unblank_screen(0), but we could eventually
|
|
* call it with 1 as an argument and so force a mode restore... that may kill
|
|
* X or at least garbage the screen but would also make the Oops visible...
|
|
*/
|
|
void unblank_screen(void)
|
|
{
|
|
do_unblank_screen(0);
|
|
}
|
|
|
|
/*
|
|
* We defer the timer blanking to work queue so it can take the console mutex
|
|
* (console operations can still happen at irq time, but only from printk which
|
|
* has the console mutex. Not perfect yet, but better than no locking
|
|
*/
|
|
static void blank_screen_t(struct timer_list *unused)
|
|
{
|
|
blank_timer_expired = 1;
|
|
schedule_work(&console_work);
|
|
}
|
|
|
|
void poke_blanked_console(void)
|
|
{
|
|
WARN_CONSOLE_UNLOCKED();
|
|
|
|
/* Add this so we quickly catch whoever might call us in a non
|
|
* safe context. Nowadays, unblank_screen() isn't to be called in
|
|
* atomic contexts and is allowed to schedule (with the special case
|
|
* of oops_in_progress, but that isn't of any concern for this
|
|
* function. --BenH.
|
|
*/
|
|
might_sleep();
|
|
|
|
/* This isn't perfectly race free, but a race here would be mostly harmless,
|
|
* at worst, we'll do a spurious blank and it's unlikely
|
|
*/
|
|
del_timer(&console_timer);
|
|
blank_timer_expired = 0;
|
|
|
|
if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
|
|
return;
|
|
if (console_blanked)
|
|
unblank_screen();
|
|
else if (blankinterval) {
|
|
mod_timer(&console_timer, jiffies + (blankinterval * HZ));
|
|
blank_state = blank_normal_wait;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Palettes
|
|
*/
|
|
|
|
static void set_palette(struct vc_data *vc)
|
|
{
|
|
WARN_CONSOLE_UNLOCKED();
|
|
|
|
if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_set_palette)
|
|
vc->vc_sw->con_set_palette(vc, color_table);
|
|
}
|
|
|
|
/*
|
|
* Load palette into the DAC registers. arg points to a colour
|
|
* map, 3 bytes per colour, 16 colours, range from 0 to 255.
|
|
*/
|
|
|
|
int con_set_cmap(unsigned char __user *arg)
|
|
{
|
|
int i, j, k;
|
|
unsigned char colormap[3*16];
|
|
|
|
if (copy_from_user(colormap, arg, sizeof(colormap)))
|
|
return -EFAULT;
|
|
|
|
console_lock();
|
|
for (i = k = 0; i < 16; i++) {
|
|
default_red[i] = colormap[k++];
|
|
default_grn[i] = colormap[k++];
|
|
default_blu[i] = colormap[k++];
|
|
}
|
|
for (i = 0; i < MAX_NR_CONSOLES; i++) {
|
|
if (!vc_cons_allocated(i))
|
|
continue;
|
|
for (j = k = 0; j < 16; j++) {
|
|
vc_cons[i].d->vc_palette[k++] = default_red[j];
|
|
vc_cons[i].d->vc_palette[k++] = default_grn[j];
|
|
vc_cons[i].d->vc_palette[k++] = default_blu[j];
|
|
}
|
|
set_palette(vc_cons[i].d);
|
|
}
|
|
console_unlock();
|
|
|
|
return 0;
|
|
}
|
|
|
|
int con_get_cmap(unsigned char __user *arg)
|
|
{
|
|
int i, k;
|
|
unsigned char colormap[3*16];
|
|
|
|
console_lock();
|
|
for (i = k = 0; i < 16; i++) {
|
|
colormap[k++] = default_red[i];
|
|
colormap[k++] = default_grn[i];
|
|
colormap[k++] = default_blu[i];
|
|
}
|
|
console_unlock();
|
|
|
|
if (copy_to_user(arg, colormap, sizeof(colormap)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void reset_palette(struct vc_data *vc)
|
|
{
|
|
int j, k;
|
|
for (j=k=0; j<16; j++) {
|
|
vc->vc_palette[k++] = default_red[j];
|
|
vc->vc_palette[k++] = default_grn[j];
|
|
vc->vc_palette[k++] = default_blu[j];
|
|
}
|
|
set_palette(vc);
|
|
}
|
|
|
|
/*
|
|
* Font switching
|
|
*
|
|
* Currently we only support fonts up to 32 pixels wide, at a maximum height
|
|
* of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
|
|
* depending on width) reserved for each character which is kinda wasty, but
|
|
* this is done in order to maintain compatibility with the EGA/VGA fonts. It
|
|
* is up to the actual low-level console-driver convert data into its favorite
|
|
* format (maybe we should add a `fontoffset' field to the `display'
|
|
* structure so we won't have to convert the fontdata all the time.
|
|
* /Jes
|
|
*/
|
|
|
|
#define max_font_size 65536
|
|
|
|
static int con_font_get(struct vc_data *vc, struct console_font_op *op)
|
|
{
|
|
struct console_font font;
|
|
int rc = -EINVAL;
|
|
int c;
|
|
|
|
if (op->data) {
|
|
font.data = kmalloc(max_font_size, GFP_KERNEL);
|
|
if (!font.data)
|
|
return -ENOMEM;
|
|
} else
|
|
font.data = NULL;
|
|
|
|
console_lock();
|
|
if (vc->vc_mode != KD_TEXT)
|
|
rc = -EINVAL;
|
|
else if (vc->vc_sw->con_font_get)
|
|
rc = vc->vc_sw->con_font_get(vc, &font);
|
|
else
|
|
rc = -ENOSYS;
|
|
console_unlock();
|
|
|
|
if (rc)
|
|
goto out;
|
|
|
|
c = (font.width+7)/8 * 32 * font.charcount;
|
|
|
|
if (op->data && font.charcount > op->charcount)
|
|
rc = -ENOSPC;
|
|
if (font.width > op->width || font.height > op->height)
|
|
rc = -ENOSPC;
|
|
if (rc)
|
|
goto out;
|
|
|
|
op->height = font.height;
|
|
op->width = font.width;
|
|
op->charcount = font.charcount;
|
|
|
|
if (op->data && copy_to_user(op->data, font.data, c))
|
|
rc = -EFAULT;
|
|
|
|
out:
|
|
kfree(font.data);
|
|
return rc;
|
|
}
|
|
|
|
static int con_font_set(struct vc_data *vc, struct console_font_op *op)
|
|
{
|
|
struct console_font font;
|
|
int rc = -EINVAL;
|
|
int size;
|
|
|
|
if (vc->vc_mode != KD_TEXT)
|
|
return -EINVAL;
|
|
if (!op->data)
|
|
return -EINVAL;
|
|
if (op->charcount > 512)
|
|
return -EINVAL;
|
|
if (op->width <= 0 || op->width > 32 || !op->height || op->height > 32)
|
|
return -EINVAL;
|
|
size = (op->width+7)/8 * 32 * op->charcount;
|
|
if (size > max_font_size)
|
|
return -ENOSPC;
|
|
|
|
font.data = memdup_user(op->data, size);
|
|
if (IS_ERR(font.data))
|
|
return PTR_ERR(font.data);
|
|
|
|
font.charcount = op->charcount;
|
|
font.width = op->width;
|
|
font.height = op->height;
|
|
|
|
console_lock();
|
|
if (vc->vc_mode != KD_TEXT)
|
|
rc = -EINVAL;
|
|
else if (vc->vc_sw->con_font_set)
|
|
rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
|
|
else
|
|
rc = -ENOSYS;
|
|
console_unlock();
|
|
kfree(font.data);
|
|
return rc;
|
|
}
|
|
|
|
static int con_font_default(struct vc_data *vc, struct console_font_op *op)
|
|
{
|
|
struct console_font font = {.width = op->width, .height = op->height};
|
|
char name[MAX_FONT_NAME];
|
|
char *s = name;
|
|
int rc;
|
|
|
|
|
|
if (!op->data)
|
|
s = NULL;
|
|
else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
|
|
return -EFAULT;
|
|
else
|
|
name[MAX_FONT_NAME - 1] = 0;
|
|
|
|
console_lock();
|
|
if (vc->vc_mode != KD_TEXT) {
|
|
console_unlock();
|
|
return -EINVAL;
|
|
}
|
|
if (vc->vc_sw->con_font_default)
|
|
rc = vc->vc_sw->con_font_default(vc, &font, s);
|
|
else
|
|
rc = -ENOSYS;
|
|
console_unlock();
|
|
if (!rc) {
|
|
op->width = font.width;
|
|
op->height = font.height;
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
int con_font_op(struct vc_data *vc, struct console_font_op *op)
|
|
{
|
|
switch (op->op) {
|
|
case KD_FONT_OP_SET:
|
|
return con_font_set(vc, op);
|
|
case KD_FONT_OP_GET:
|
|
return con_font_get(vc, op);
|
|
case KD_FONT_OP_SET_DEFAULT:
|
|
return con_font_default(vc, op);
|
|
case KD_FONT_OP_COPY:
|
|
/* was buggy and never really used */
|
|
return -EINVAL;
|
|
}
|
|
return -ENOSYS;
|
|
}
|
|
|
|
/*
|
|
* Interface exported to selection and vcs.
|
|
*/
|
|
|
|
/* used by selection */
|
|
u16 screen_glyph(const struct vc_data *vc, int offset)
|
|
{
|
|
u16 w = scr_readw(screenpos(vc, offset, true));
|
|
u16 c = w & 0xff;
|
|
|
|
if (w & vc->vc_hi_font_mask)
|
|
c |= 0x100;
|
|
return c;
|
|
}
|
|
EXPORT_SYMBOL_GPL(screen_glyph);
|
|
|
|
u32 screen_glyph_unicode(const struct vc_data *vc, int n)
|
|
{
|
|
struct uni_screen *uniscr = get_vc_uniscr(vc);
|
|
|
|
if (uniscr)
|
|
return uniscr->lines[n / vc->vc_cols][n % vc->vc_cols];
|
|
return inverse_translate(vc, screen_glyph(vc, n * 2), 1);
|
|
}
|
|
EXPORT_SYMBOL_GPL(screen_glyph_unicode);
|
|
|
|
/* used by vcs - note the word offset */
|
|
unsigned short *screen_pos(const struct vc_data *vc, int w_offset, bool viewed)
|
|
{
|
|
return screenpos(vc, 2 * w_offset, viewed);
|
|
}
|
|
EXPORT_SYMBOL_GPL(screen_pos);
|
|
|
|
void getconsxy(const struct vc_data *vc, unsigned char xy[static 2])
|
|
{
|
|
/* clamp values if they don't fit */
|
|
xy[0] = min(vc->state.x, 0xFFu);
|
|
xy[1] = min(vc->state.y, 0xFFu);
|
|
}
|
|
|
|
void putconsxy(struct vc_data *vc, unsigned char xy[static const 2])
|
|
{
|
|
hide_cursor(vc);
|
|
gotoxy(vc, xy[0], xy[1]);
|
|
set_cursor(vc);
|
|
}
|
|
|
|
u16 vcs_scr_readw(const struct vc_data *vc, const u16 *org)
|
|
{
|
|
if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
|
|
return softcursor_original;
|
|
return scr_readw(org);
|
|
}
|
|
|
|
void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
|
|
{
|
|
scr_writew(val, org);
|
|
if ((unsigned long)org == vc->vc_pos) {
|
|
softcursor_original = -1;
|
|
add_softcursor(vc);
|
|
}
|
|
}
|
|
|
|
void vcs_scr_updated(struct vc_data *vc)
|
|
{
|
|
notify_update(vc);
|
|
}
|
|
|
|
void vc_scrolldelta_helper(struct vc_data *c, int lines,
|
|
unsigned int rolled_over, void *base, unsigned int size)
|
|
{
|
|
unsigned long ubase = (unsigned long)base;
|
|
ptrdiff_t scr_end = (void *)c->vc_scr_end - base;
|
|
ptrdiff_t vorigin = (void *)c->vc_visible_origin - base;
|
|
ptrdiff_t origin = (void *)c->vc_origin - base;
|
|
int margin = c->vc_size_row * 4;
|
|
int from, wrap, from_off, avail;
|
|
|
|
/* Turn scrollback off */
|
|
if (!lines) {
|
|
c->vc_visible_origin = c->vc_origin;
|
|
return;
|
|
}
|
|
|
|
/* Do we have already enough to allow jumping from 0 to the end? */
|
|
if (rolled_over > scr_end + margin) {
|
|
from = scr_end;
|
|
wrap = rolled_over + c->vc_size_row;
|
|
} else {
|
|
from = 0;
|
|
wrap = size;
|
|
}
|
|
|
|
from_off = (vorigin - from + wrap) % wrap + lines * c->vc_size_row;
|
|
avail = (origin - from + wrap) % wrap;
|
|
|
|
/* Only a little piece would be left? Show all incl. the piece! */
|
|
if (avail < 2 * margin)
|
|
margin = 0;
|
|
if (from_off < margin)
|
|
from_off = 0;
|
|
if (from_off > avail - margin)
|
|
from_off = avail;
|
|
|
|
c->vc_visible_origin = ubase + (from + from_off) % wrap;
|
|
}
|
|
EXPORT_SYMBOL_GPL(vc_scrolldelta_helper);
|
|
|
|
/*
|
|
* Visible symbols for modules
|
|
*/
|
|
|
|
EXPORT_SYMBOL(color_table);
|
|
EXPORT_SYMBOL(default_red);
|
|
EXPORT_SYMBOL(default_grn);
|
|
EXPORT_SYMBOL(default_blu);
|
|
EXPORT_SYMBOL(update_region);
|
|
EXPORT_SYMBOL(redraw_screen);
|
|
EXPORT_SYMBOL(vc_resize);
|
|
EXPORT_SYMBOL(fg_console);
|
|
EXPORT_SYMBOL(console_blank_hook);
|
|
EXPORT_SYMBOL(console_blanked);
|
|
EXPORT_SYMBOL(vc_cons);
|
|
EXPORT_SYMBOL(global_cursor_default);
|
|
#ifndef VT_SINGLE_DRIVER
|
|
EXPORT_SYMBOL(give_up_console);
|
|
#endif
|